GoldStar Hydration Bladder, Running Cycling Hiking Climbing Non-Toxic BPA Free Hydration Pack Bladder, Outdoor Leakproof Water Reservoir Multiple Usage: The GOLDSTAR hydration pack adopts detachable design. The outside backpack can be sports using along with the hydration pack, or use the hydration pack individually Large Volume: Size 17 X 7, the total capacity up to 105 Oz / 3L. The outside compartment will fit your clothes, keys, purses, phones etc., or use as a bag to add ice cubes for a cooler drink Durability: The hydration pack uses oxford nylon material to ensure waterproof performance and durability. It wont leak as long as the screw between the bladder and the straw tightened well Well-fitting: Adjustable shoulder / chest straps make the hydration pack fit chest sizes from kids to adults, perfect for hiking, running, biking, walking or taking with you for the day GUARANTEE: Life-time Warranty, Our GOLDSTAR Products Undergo Rigorous Quality Test to Ensure Our Customers A Great Experience. We Place Our Top Priority on Customer Shopping Experience. Any Other Problem, Please Feel Free to Contact Us