The EagleGear FLUID 1000 denier Dupont Cordura Reservoir pack safely houses your 128 ounce Reservoir with heavy-duty construction, nylon webbing, YKK zippers, and Fastex closures. This pack is designed for firefighters: attach over your wildland pack, or clip on to your urban or wildland web-system, preventing your hydration system from “flopping” on your back. The reversible Reservoir, is the best choice to outfit your fire fighting pack with the easiest to clean hydration system on the market. The reversible RESERVOIR is the best choice to outfit your fire fighting pack with the easiest to clean hydration system on the market. The reservoir has a pressure reinforced closure with a full-width opening for easy filling and turning the reservoir inside out. The reservoir is made from FDA approved durable polyurethane, super strong materials that can be stretched up to 8 times its original length without failing. You could run this over with a fire truck and it will not pop. Your filled Reservoir and the drink tube may be completely frozen prior to use. Now you can have cool drink attached to your pack. At the end of your day, pour out your drink and turn your Reservoir inside out, just like a sock, wash with mild detergent, then let it dry completely. No moisture means no opportunity for bacteria to grow.