Whether you choose to mountain bike, hike, kayak or run, these hydration backpacks will help keep you hydrated wherever adventure takes you! Designed with a gray body with colorful accents, each backpack is made of 420D nylon ripstop and mesh and has room for 1 liter of liquid. Features include an adjustable waist and sternum straps for extra stability, an inside zippered pocket, adjustable shoulder straps, front zippered pocket, back zippered pocket and a reservoir that features a wide mouth opening and flow tube with drinking valve. A perfect gift for any outdoorsy-person, you can customize each backpack with a company name or logo to put your brand on the move!