ZOMAKE Hydration Pack with 2L Water Bladder Backpack Vest for Running, Cycling, Hiking, Climbing, Kids LIGHTWEIGHT---- Perfect Ergonomic Design fits men and women to stay hydrated pack You will not feel the sense of weight affect movement VOLUME----2 Liter/75 OZ bladder includes storage compartments that will fit your clothes, iPad, phones 11" -12" laptops and even a DSL camera VARIOUS USAGE----BPA Free bladder which keeps you hydrated, It also keeps the water fairly cool.Enough to get you through a day of hiking, cycling, running or biking DESIGNED----The main compartment is covered with our own diamond Rip Stop Nylon material which serves two functions. 1. It is water resistant so your belongings stay dry in light/medium rain. It is also durable reduces wear and tear so your pack lasts longer GUARANTEE---- If for any reason you are not 100% satisfied with your ZOMAKE Hydration Pack, please let us know and we will immediately refund your purchase price - no questions asked