Ergon’s mid-sized BX3 Pack makes an excellent companion for endurance riders who need to take plenty of food and supplies with them. The expandable cargo area has two compartments for easy organization, and an external helmet retainer for the occasional hike-a-bike or post-ride chill. Its tough rip-stop nylon construction stands up to the rigors of long days on the trail, and the airy, 4-zone open-mesh SpacerFabric provides cooling airflow along your back when the action heats up. You’ll love Ergon’s Adaptive Carrying System, which hugs the pack snugly against your lower back and hips for a secure fit, and an adjustable back panel gives you a custom fit for maximum comfort. There’s even an integrated rain cover for when your ride lasts through varying weather. Plus, sleek waistband pockets provide quick-access to tools, electronics, or nutrition.