Monstrum Tactical HP01 Hydration Pack, 3 Liter (100 ounce) Bladder Capacity Rugged heavy-duty nylon construction, resistant to tears and abrasion Fully removable 3 liter (100 ounce) water bladder Hands-free hydration hose with bite valve, gently biting the valve opens up the flow of water Sleek and compact design, only 17" x 8" x 1.5" in size and 15 ounces in weight Suitable for hiking, running, biking, skiing, and other outdoor activities