Hydration Pack is a heavy duty hydration pack suitable for hiking, running, biking, skiing, and other outdoor activities. It is constructed from rugged heavy-duty nylon and is resistant to tears and abrasion. The fully removable water bladder has a 3 liter (100 ounce) capacity. Water is drawn via the hands-free hydration hose with bite valve, gently biting the valve to open up the flow of water. Sleek and compact in design, only 17 x 8 x 1.5 inch size and 15 ounces in weight. Large filling port with secure seal. Bite valve design, convenient for switch on/off the flow of water. Comes with bite valve cover. Completely safe to use. With hand carry strap and adjustable shoulder strap. Keep water cool for hours. Extra carrying space for storage.