evo.com | Thule Hydration Packs > The Thule Rail Hydration 18L Backpack is a top-notch bike pack for long rides and grueling ascents. Store an extra layer in the front shove-it pocket and easily access protein bars and a phone in the lower back jersey pockets. And when the going gets tough, the hands-free ReTrakt magnetic hose system is there to quench thy thirst. Integrated CE-Certified Level 1 Koroyd Back Protection Nylon Spare Battery Pocket 2.5L HydraPak Reservoir Slide closure and locking bite valve prevent leaks. 9.45 x 9.45 x 18.11 in | Thule Rail Hydration 18L Backpack 2024 | Nylon