Adults

Ultimate aero road bike helmet with wind-tunnel proven design and the added protection of MIPS. Aero got cool The Ballista MIPS road helmet projects racers to their target just like the ancient Greek missile weapon it was named after. Thanks to a wind tunnel-proven design and superior venting with our unique internal channeling, Ballista launches you to the front of peloton breakaways and sprint-line finishes. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientists to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - The Boa System lets riders easily secure and adjust helmet fit with one hand - Front Center Channel's distinct vent shape draws in significantly more air - Internal, recessed channels move airflow over your head to stay cool and dry - In-mold composite skeleton increases helmet integrity for larger vent variations - AgION antimicrobial pads wick moisture and completely eliminate odors naturally - LockDown dividers make helmet strap management clean and are easy to adjust - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Details - Shell Material: Polycarbonate

All-purpose, value-packed helmet balances performance and comfort with the added protection of MIPS. All-purpose protection for every rider The Solstice MIPS helmet is proof you don't have to spend a lot of money to get a great fitting, great looking, and easy-to-use bike helmet. Featuring MIPS, Multi-directional Impact Protection System, it includes a sleek built-in brim with plug ports for a clean look when the additional visor is removed. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Product details - MIPS Brain Protection System - Fidlock magnetic buckle fastens effortlessly for a quick, secure fit - Intuitive, one-handed Headmaster fit system adjusts height and circumference - Built-in and removable visor options give you two choices for constant coverage - LockDown dividers make helmet strap management clean and easy to adjust - Internal, recessed channels move airflow over your head to keep you cool and dry - Soft, comfortable, moisture-wicking and washable helmet pads for added comfort - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Specifications - Size (head circumference): Small/Medium (51-58cm); Medium/Large (55-61cm) - Fit system: Headmaster II - Pad material: Moisture wicking pads - Buckle type: Fidlock buckle - Includes: Visor plugs - Weight: 335g (Small/Medium)

Bontrager XXX WaveCel delivers high-performance protection and the best in aerodynamics and comfort. XXX is the WaveCel helmet of choice for the Trek-Segafredo men's and women's teams. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. - WaveCel advanced helmet technology - The Boa System lets you easily secure and adjust helmet fit with just one hand - Easy-to-use adjustable strap dividers allow for a fine tune fit - An aerodynamic shape helps you outsmart the wind and ride faster - AgION antimicrobial pads wick away moisture and eliminate odors naturally - Additional NoSweat pad with silicone channel keeps sweat out of eyes for constant clarity - Team Trek-Segafredo sticker kit included with Viper Red, White, and Visibility Yellow colorways - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Sizing: - Small: 51-57cm - Medium: 54-60cm - Large: 58-63cm

All-purpose, value-packed helmet balances performance and comfort. Value-packed protection Wear it and believe it. The Solstice is proof you don't have to spend a lot of money to get a great fitting, easy-to-use cycling helmet designed to keep you protected during all your bike riding adventures. Product details - Designed for larger vents and increased airflow while maintaining structural integrity - Built-in and removable visor options give you two choices for constant coverage - Intuitive, one-handed Headmaster fit system adjusts height and circumference - LockDown dividers make helmet strap management clean and easy to adjust - Internal, recessed channels move airflow over your head to keep you cool and dry - Soft, comfortable, moisture-wicking, and washable helmet pads - Crash Replacement Guarantee provides free helmet replacement if it is involved in a crash within the first year of ownership Specifications - Size (head circumference): Small/Medium (51-58cm); Medium/Large (55-61cm) - Fit system: Headmaster II - Pad material: Moisture wicking pads - Buckle type: Standard buckle - Includes: Visor plugs - Weight: 290g (Small/Medium)

Bell have worked tirelessly to refine the fit of its helmets so that they represent the pinnacle of comfort. This philosophy starts with the flagship Z20 and extends throughout the range. The Falcon represents the same attention to fit and finish that defines quality. It utilizes integrated MIPS, offering comprehensive energy management as well as allowing for a sleeker, more compact overall design. Multi-adjustable Float Fit retention and Bell's unique Sweat Guide further enhance fit, while generous vents and wind-cheating aerodynamics provide ample airflow to keep things cool. The Falcon is the easy choice for all roads, wherever they may lead. - 18 vents - Compliance: CPSC bicycle - MIPS-equipped - MIPS stands for Multi-directional Impact Protection System, which is a leading slip-plane technology inside the helmet designed to reduce rotational forces that can result from certain impacts. - Construction: Fusion in-mold polycarbonate shell - a process pioneered by Bell bonds the helmet's outer shell to the EPS foam liner to create a sturdier helmet. - Lightweight internal polycarbonate roll cage - Fit System: Float fit - a minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments (integrated with MIPS) - Retention System: No-twist tri-glides: quick-adjust fasteners that help keep straps flat and properly positioned - Interior: Sweat guide pad design pulls moisture away from the brow pad and away from eyewear - Rear reflective strip - 297 grams (size M)

The Serfas Kilowatt is E-Bike certified and features adjustable venting which be can be opened or closed depending on how much air flow you want, also a built-in rear LED safety light for added visibility with additional reflective design accents, and an easy-to-adjust fit system. - Tested and Certified to NTA 8776 E-Bike Helmet Standards - Adjustable Top Vents (Slide Open/Close) - Built-In Rear Light - Rear-Facing Reflective Accents - Adjustable Straps - Easy-To-Adjust Fit System (Rear Knob) - Weight: 484 Grams - Vent Count: 8 - Sizes: S/M (54-58cm), L/XL (58-61cm)

For trail or town Built for riders who live active lifestyles and want to stay protected, the Quantum cycling helmet looks just as good as it fits. Featuring MIPS, Multi-directional Impact Protection System, superior ventilation, and excellent coverage. Get it all and even more with a removable visor allowing Quantum to be your go-to helmet no matter what type of riding. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - The Boa System lets riders easily secure and adjust helmet fit with one hand - In-mold composite skeleton increases helmet integrity for larger vent variations - Soft, comfortable, moisture-wicking, and washable helmet pads - Internal, recessed channels move airflow over your head to stay cool and dry - Removable snap-on visor and port covers provide multiple looks to fit your style - LockDown dividers make helmet strap management clean and are easy to adjust - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Capable coverage, comfortable protection Find the perfect fit in a stylish lid. Starvos offers protection, airflow management, and comfort in a wide range of color options. It comfortably fits a wide range of head sizes, allowing you to find the right fit every time. Product details - In-mold composite skeleton increases helmet integrity and larger vent variations - Intuitive, one-handed Headmaster fit system adjusts height and circumference - Soft, comfortable, moisture-wicking, and washable helmet pads - FlatLock dividers make helmet strap management simple through fixed position fit - Internal, recessed channels manage airflow through the helmet and over the head - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

The Giro Switchblade MIPS is an ASTM downhill-certified full-face helmet with a removable chinbar. Everything about the Switchblade is optimized for the descent, and that’s why it’s certified to CPSC, EN-1078 and ASTM-1952-DH with and without the chinbar. The chinbar is easy to remove—just push the buttons under the chinbar, rotate up, and remove—and it’s just as easy to reinstall. The Switchblade MIPS features the Roc Loc Air DH fit system, which has a bumper around the dial to prevent accidental adjustments if your helmet contacts your backpack or neck brace—all while keeping you cool. When the chinbar comes off, Wind Tunnel cheek pad ventilation adds even more cooling power as you start to climb. Plus, the full-cut style gives this helmet an aggressive look and provides ASTM-certified coverage even when the chinbar is removed. When your ride is all about descending, your helmet should be too, and the Switchblade MIPS is the only removable chinbar helmet that is truly built for the down.

The Cormick MIPS offers a comfortable fit with deep coverage and open ventilation in a design that is suitable for nearly any ride. It’s built using In-Mold construction to reduce weight while enhancing durability to stand up to everyday use. The ease and comfort of Giro's acclaimed Roc Loc Sport MIPS fit system makes fitting as easy as turning a dial, and the fit system is seamlessly integrated with the Multi-Directional Impact Protection System (MIPS), which can redirect energy and provide more protection in certain impacts. When you put it all together, you get the versatility you need to ride everything from forested fire-roads to swooping singletrack trails to the city streets.

When your trail rides include technical descents and challenging climbs, the Giro Chronicle MIPS provides all the essential performance and protection you need in an affordable package. It drafts off the design language of their premium Montaro MIPS helmet, and offers many of the key features. Its compact shape provides deep, confident coverage, and the Roc Loc 5 fit system allows you to easily dial in fit tension and adjust vertical position with a single hand. The Chronicle MIPS is designed for goggle compatibility, and the P.O.V. Plus visor allows you to lift the visor and place your goggles on the front of the helmet. The Coolmax padding has great wicking properties, and it’s extra plush to provide all-day comfort on the trail. The helmet was designed with MIPS, which redirects impact energy to provide more protection in certain impacts.

Whether your rides are short and sweet or epic adventures, Bontrager's Quantum WSD has got you covered. It features in-molded construction with internal reinforcements for top-notch safety. And you'll love the all the ventilation, even at low speeds. It comes in two different sizes, and when you combine that with the LockDown side straps and the Micro-Manager Fit System, you've got a custom fit that is tailor-made just for you. Plus, it sports washable fit pads and a removable, snap-on visor, too. - Small = 50-56cm - Medium = 54-60cm

For trail or town Built for riders who live active lifestyles and want to stay protected, the Quantum cycling helmet looks just as good as it fits. Featuring MIPS, Multi-directional Impact Protection System, superior ventilation, and excellent coverage. Get it all and even more with a removable visor allowing Quantum to be your go-to helmet no matter what type of riding. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - The Boa System lets riders easily secure and adjust helmet fit with one hand - In-mold composite skeleton increases helmet integrity for larger vent variations - Soft, comfortable, moisture-wicking, and washable helmet pads - Internal, recessed channels move airflow over your head to stay cool and dry - Removable snap-on visor and port covers provide multiple looks to fit your style - LockDown dividers make helmet strap management clean and are easy to adjust - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Take your protection to the next level. Bontrager Specter WaveCel offers the best in versatility and comfort for everyday rides on roads, trails, gravel, and more. From dirt to pavement, fast or slow, this new wave of protection delivers the confidence you need anywhere you ride or race. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. - WaveCel advanced helmet technology - The Boa System lets you easily secure and adjust helmet fit with just one hand - Fidlock magnetic buckle fastens effortlessly for a quick, secure fit - Highly ventilated design offers more airflow to keep you cool - Soft, comfortable, moisture-wicking, and washable helmet pads - Reflective elements on back of helmet offer enhanced visibility to be seen - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Sizing: - Small: 51-57cm - Medium: 54-60cm - Large: 58-63cm

Capable coverage, comfortable protection Starvos MIPS women's road helmet offers ample protection, airflow management, and comfort with the widest range of head sizes. A clear choice for cyclists of all levels. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - The Boa System lets riders easily secure and adjust helmet fit with one hand - In-mold composite skeleton increases helmet integrity for larger vent variations - Soft, comfortable, moisture-wicking and washable helmet pads - FlatLock dividers make helmet strap management simple through fixed position fit - Internal, recessed channels move airflow over your head to stay cool and dry - Reflective elements on back of helmet - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Wear it and believe. The Solstice is proof you don't have to spend a lot of money to get a great fitting, easy-to-use cycling helmet designed to keep you protected during all your bike riding adventures. Key features - Intuitive, one-handed Headmaster fit system adjusts height and circumference - Built-in and removable visor options give you two choices for constant coverage - In-mold composite skeleton increases helmet integrity for larger vent variations - LockDown dividers make helmet strap management clean and are easy to adjust - Internal, recessed channels move airflow over your head to stay cool and dry - Reflective elements on back of helmet for enhanced visibility - Soft, comfortable, moisture-wicking, and washable helmet pads - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Bontrager Charge WaveCel Commuter is a fashion-forward helmet that earns top marks in style and safety. It’s perfect for commutes, e-bike rides, and everyday adventures, and it's built with the most advanced helmet safety tech available so you don’t have to choose between fashion and function. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. - WaveCel advanced helmet technology - The Boa System lets you easily secure and adjust helmet fit with just one hand - Fidlock magnetic buckle fastens effortlessly for a quick, secure fit - Rear Blendr mount system easily integrates Bontrager light accessories - Soft, comfortable, moisture-wicking, and washable helmet pads - Built-in visor provides constant coverage against sun and rain - Reflective elements on back of helmet offer enhanced visibility to be seen - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Sizing: - Small: 51-57cm - Medium: 54-60cm - Large: 58-63cm

An evolution of our award-winning Forefront helmet, the completely redesigned Forefront 2 is a full-coverage helmet ideal for all-mountain riders who demand superior protection, ventilation and eyewear integration. For added protection, Koroyd has been extended into the back of the helmet to now fully encompass the helmet. Internal air channels are combined with open intake and exhaust ports to maximize ventilation, while AirEvac channels promote airflow to prevent fogging of your eyewear. The Forefront 2 also features channels on the front and rear of the helmet for eyewear storage, and a three-position visor that rotates high to allow for goggle storage. - Lightweight Aerocore in-mold construction - Zonal ventilated protection featuring patented Koroyd material - Integrated skeletal structure - MIPS system available in all colors - VaporFit adjustable fit system - 20 optimized vents - XT2 anti-bacterial performance lining - Ultra-light single layer webbing - AirEvac ventilation - Three-position adjustable visor - Ultimate sunglass and goggle integration - Integrated accessory mount sold separately - Weight (Size M, MIPS) 13.4oz / 380 grams - Certification: CPSC, CE EN 1078 Sizing - Small: 51 – 55cm - Medium: 55 – 59cm – Large: 59 – 62cm

Whether you're climbing to reach an epic descent or taking in amazing views as you cover miles of singletrack, Smith's Forefront helmet offers the ventilated protection you need. A full-coverage helmet, the Forefront's Aerocore construction featuring Koroyd material creates a low volume helmet with 21 cooling vents. Smith's AirEvac vents move moisture away from your goggles so your vision remains clear in all weather conditions while a goggle retention strap ensures they stay in place as you race downhill. In addition to being compatible with your eyewear, this stellar helmet integrates seamlessly with camera and light mounts (mounts sold separately). Of course, Smith delivers an excellent fit thanks to the X-Static performance lining, ultra-light webbing, and Vaporfit adjustable fit system. Now all you have to decide is if you want to remove the adjustable visor or leave it on before you take off for your next adventure!

Capable coverage, comfortable protection Starvos MIPS road helmet offers ample protection, airflow management, and comfort with the widest range of head sizes. A clear choice for cyclists of all levels. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - The Boa System lets riders easily secure and adjust helmet fit with one hand - In-mold composite skeleton increases helmet integrity for larger vent variations - Soft, comfortable, moisture-wicking and washable helmet pads - FlatLock dividers make helmet strap management simple through fixed position fit - Internal, recessed channels move airflow over your head to stay cool and dry - Reflective elements on back of helmet - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Designed with input from freeride legend, Richie “The Schleyer” Schley, iXS’s Trail RS helmet is a perfect blend of comfort, style, and protection for serious trail riding. Made to meet the demands of today’s wide-ranging all-mountain adventures, the Trail RS uses in-mold construction on the main shell and a dual in-mold design in the rear for reduced weight with excellent energy absorption. The ErgoFit Ultra retention system allows horizontal and vertical adjustment, and the 180° cradle provides one-handed adjustment to achieve the ideal fit. 22 large vents rush cool air across your head, and the simple Y-Clip adjustable strap is a set-it-and-forget-it operation. An adjustable MX-style visor with a crash-release completes the functionality and style of this legit trail helmet.

Ticket to Ride Usually, when it comes to value, there's going to be some sort of compromise. With the Avenue, we took a hard line against that. We gave it carefully sculpted vents and a graceful shape. We packed it with the same features and careful touches that define our flagship helmets, such as our Sweat Guide liner and No-Twist Tri-Glides for ease of adjustment. Not to mention integrated MIPS. But we didn't stop there. We took it one step further by offering an LED version. We've incorporated a bright, 20-lumen rear LED into our easy-to-use Ergo Fit system. Its unobtrusive, highly visible, easily rechargeable with an included micro USB, and it just might make the difference between being seen or not. Specs - MIPS: Integrated MIPS (multi-directional impact protection system) - MIPS is designed to reduce rotational forces that can result from certain impacts. By integrating the MIPS slip-plane into the fit system, we are able to reduce complexity and weight for a compact, better ventilated helmet that fits more closely to the head. - Construction: Fusion in-mold polycarbonate shell - a process pioneered by Bell bonds the helmet's outer shell to the EPS foam liner to create a sturdier helmet. - Sport: cycling - Number of vents: 18 vents - Interior/liner type: Sweat guide pad design pulls moisture away from the brow pad and away from eyewear - Fit system: Ergo Fit LED - sleek, easy-to-use dial system for one-handed adjustments (integrated with MIPS layer) - Certification: CPSC bicycle - Sizing: 50 – 57cm, 19.7 – 22.4-inch

Giro's Synthe is the pinnacle of road helmet design. It offers impressive cooling power, minimal weight, supreme fit and streamlined aerodynamic efficiency. It is a true synthesis of all features a modern rider wants in a high-performance road racing helmet. The difference is clear in the wind tunnel—extensive testing reveals that the Synthe is nearly as efficient as the fastest time trial helmets. But the Synthe’s greatest attributes are comfort and ventilation. At it’s heart you’ll find the Roc Loc Air fit system. Micro-adjustments allow you to custom-tune tension and fore-aft tilt with one hand and a patented design suspends the helmet over the top of the skull, allowing airflow to pass freely over your head. Cooling power is further boosted by elaborate internal channeling and a series of massive vents; the Synthe sets a new bar for ventilation.

Don’t stop the ride when the temperatures plummet. The Shackleton helmet is ready for the cold with its cozy inner liner and separate neck roll with ear covers. The winter liner provides a variety of venting options, so you can customize the warmth of your helmet based on what the thermometer reads. As winter turns to spring and the temperatures rise, you can remove the liner and neck roll for a year-round riding solution. Other features include a removable, soft visor to shade your eyes; an integrated Light Clip at the back that allows you to snap your light to the helmet for enhanced visibility; and a reinforced vent becomes a durable Lock Port so you can lock your helmet to the bike for convenience.

The Z20 is the result of years spent analyzing how helmets fit, optimizing aerodynamics, reviewing test data, gathering real-world feedback, and applying our cumulative knowledge of impact management. Our unique progressive layering energy management system utilizes two separate layers of hard-shelled EPS foam in addition to Integrated MIPS—enabling us to improve impact performance via multi-density foam and at the same time deliver a more compact overall shape, sleeker design and maximized ventilation. And thanks to a smart combination of the MIPS layer and retention system, the Z20 sets a new standard in fit and comfort. Superb fit is further optimized with the Float Fit Race retention system, featuring height- and width-adjustable cradles and an intuitive, easy-to-use tension dial, and then finished off with our comfortable and sweat-wicking X-Static padding. No matter how long, hot or hard the ride is, the Z20 will ensure that cool heads prevail. SIZES - Small = 52–56 cm - Medium = 55–59 cm - Large = 58–62 cm

Built with the same core design principles as the pro-level Z20, the Stratus combines lightweight aero efficiency with cutting-edge comfort technologies. The shape was refined for all-around road performance — ventilated for long climbs but still fast for the flats — and the integrated Float Fit system offers comfort and security with a streamlined fit and an oversize dial that’s easy to adjust with one hand. The Overbrow Ventilation system pulls cool air in through the front and pushes it through an air-channel matrix to reduce overheating. And thanks to the adjustable No-Twist Tri-Glides, the straps stay flat and properly positioned no matter how hard you’re hammering. This model also includes MIPS (Multi-Directional Impact Protection System) for added protection in certain types of impacts.

Let your street style shine When the city is your stomping ground, the Camden MIPS is the helmet you reach for. The compact shape of the Camden MIPS creates attractive style while still providing extended coverage, and the plush anti-microbial padding keeps you comfortable over the course of a day from your morning commute to rolling with friends for an evening show. The integrated rear light makes the entire rear of the helmet glow red, for substantially increased visibility on the road, and the Roc Loc City Air system provides superior fit comfort with enhanced ventilation via four large vents that are easily adjustable on the fly. The Camden MIPS also is equipped with the Multi-Directional Impact Protection System, which can redirect energy and provide more protection in certain impacts, and it is certified to the new Speed E-Bike standard NTA 8776 for the latest in head protection technology. - Wind tunnel vents with internal channeling - Deep internal channels with 4 closable upper vents - 10 vents, four with adjustable wind tunnel ventilation - CPSC bicycle certification - Hybrid in mold construction - Extended coverage - Roc Loc Air fit system

The AIRCRAFT is 100%'s premier Downhill MTB helmet precision engineered with a Carbon/Kevlar composite shell for an ultra-lightweight feel. Ventilation is enhanced with 25 different channels to manage airflow creating one of the most ventilated DH helmets on the market. Already loaded with performance and safety features, all AIRCRAFT helmets now come equipped with MIPS Technology making it an even safer choice. - Ultra-light design featuring aerospace Carbon/Kevlar composite shell - MIPS technology adds more protection against rotational violence to the brain caused by angled impacts - Active cooling system maximizes airflow with 25 vents and channels - Washable, antibacterial comfort liner, cheek pads, and chin strap covers - Emergency release cheek pads and integrated release system compartment for quick, safe removal - Titanium D-Ring buckle provides a secure fit while saving weight - Engineered with 2 shell sizes and 3 EPS sizes to achieve the perfect fit - Adjustable visor with machined, lightweight aluminum screws - Durable helmet case with integrated goggle pocket included

Born from Bell’s unrivaled heritage in motocross, the Transfer was created for everyday shredding. With Overbrow Ventilation to keep you cool and Quicksnap removable cheek pads for easy cleaning, this helmet is ready for ripping laps at the bike park or hitting your local DH race. - 9 helmet vents, 3 brow ports - Overbrow ventilation features intake ports on the brow of the helmet to usher in cool air and push it through the air-channel matrix for full-head ventilation - Compliance: CPSC bicycle; ASTMA F1952-00 (downhill); ASTM F2032-06 (BMX) - Construction: Polycarbonate shell - Visor: Flying bridge visor - originally developed for moto use, this visor's side-mounted screws are easy to adjust, even while wearing gloves - Safety: Breakaway screws

No other helmet manufacturer has deeper roots in motocross. Much of what Bell engineers learned from creating the award-winning Moto-9 helmet went into the Full-9 full-face mountain bike helmet. Take that unrivaled experience, combine it with feedback from downhill and BMX pros, and you have the winning formula. The Full-9 meets the most stringent ASTM Downhill Mountain Bike Racing standard as well as CPSC and CE bicycle safety benchmarks. Additional motocross trickle-down technologies include the Eject Helmet Removal System and magnetic cheekpads. Beyond that, the Full-9 includes features like Soundtrax built-in speaker pockets and audio cable routing, and an integrated breakaway camera mount. Add in a lightweight carbon shell, a wide field of view, Overbrow Ventilation intakes and Velocity Flow Ventilation and you have the world’s most advanced helmet for DH or BMX. - 1130g (Medium) - X-Small/Small = 51–55cm - Medium = 55–57cm - Large = 57–59cm - X-Large/XX-Large = 59–63cm