You've been asking for it, and M48 has delivered in a big way with this brand new M48 OPS hydration bag. The heavy-duty nylon construction is built to last in even the most rigorous and rugged conditions. It's a must-have accessory for mountain climbers, hikers and extreme outdoors enthusiasts. The padded back and adjustable straps ensure a custom, comfortable fit. The straps feature attachment webbing, and there are multiple pockets and zippers to store your smaller accessories. Best of all, it includes a 2.5 liter hydration bladder.