All-day gravel epics or big ride on the mountain bike on new terrain have us wearing the USWE Epic 8 Hydration Backpack. This quality, functional, and surprisingly spacious backpack includes 3L of water storage along with its overall capacity. We're using this pack to easily stuff in c02's, bacon strips, and even a light change of clothes to get ready for the long haul. The NDM 1.2 provides a 4-point harness to keep the pack in place and bounce-free while we ride.