12L Hydration Pack with 2L Hydration Bladder - Hiking Travel Water Bag Rucksack - Waterproof Bladder Backpack for Camping Running Cycling Biking Backpacking Climbing Reservoir System Backpacks Blue 2L Hydration Bladder Include, BPA free & FDA Approved durable leakproof hydration bladder with soft mouthpiece Reflective detail for added safety, Adjustable mesh shoulder straps and hipbelt Mesh padded back keeps you comfortable and wicks away moisture Independent suspension with adjustable Slider Sternum Strap and lifesaving whistle 12L Large front-loading main compartment and easy-access front pocket