GreenEmart 3L Hydration Pack with Bladder Water Bag Pouch - US Army 3 Liter (100 ounce) Bladder Water Bag Pouch Hunting Hiking Climbing Running Survival Outdoor Backpack High Quality - Rugged 600 Denier Polyester heavy-duty construction with PVC lining, resistant to tears and abrasion Convenience - A switch on/off bite valve, convenient for control the flow of water. Slender design for physical training. Fully adjustable webbing shoulder straps Fully removable 3 liter (100 ounce) water bladder. Two layers cargo design, one for hydration bladder, and the other for extra carrying purpose Hands-free hydration hose with bite valve, gently biting the valve to open up the flow of water Sleek and compact design, only 17" x 8" x 1.5" in size and 15 ounces in weight