Stay hydrated when you're hiking or biking with this multi compartment hydration backpack from ecogear. The ecogear Water Dog hydration backpack is made from recycled materials made from RPET water bottles and polyester material and features a small shape that includes a two liter bladder, an insulated water pouch, and several pockets for storage and organization. This backpack includes dual zipper main compartments, a stuff pouch, an organizer pocket with a key clip, and a water resistant pouch to hold valuables and small accessories. A lightweight air mesh padded back and shoulder straps offer comfort for all day active use.