evo.com | Thule Hydration Packs > We've all wondered if our loaded backpacks will keep us safer in a crash. The opinions are mixed, with the possible cushion from a hydration bladder being offset by any jabby pumps or stabby tools inside. With the Thule Rail Pro 12L Hydration Pack, you'll know for sure: this pack has integrated back protection, certified to protect you, should things go south. This is an endurotron's dream! 2.5L HydraPak Reservoir Slide closure and locking bite valve prevent leaks. Easy-Access Lash Points for Pads, Helmet, or Chin Bar Nylon 8.3" x 7.1" x 17.3" Integrated CE-Certified Level 1 Koroyd Back Protection | Thule Rail Pro 12L Hydration Pack in Gray | Nylon