Come and see our amazing products. Back lining and shoulder straps are all made of lightweight, breathable mesh nylon fabric, the hydration backpack can keep your back dry and comfortable for outdoor sports.And its double built-in waist straps improve its wear and tear resistance to ensure the pack's life last longer.2L WATER BLADDER--great alternative compared to a water bottle.You don't need to carry too much stuff and make your normal backpack full of bottles when you are hiking/walking/running.This is very helpful for you, it makes feel less trouble carrying multiple water bottles and also saves your time and energy.With soft shoulder straps,the adjustable hydration backpack suitable for men,women,and kids.Wide shoulder straps design with loop for hose setting help you to reduce the burden and keep you wear it for hours Pls confirm with us about the packing info, stock color and exact production time before placing your order