NEW gear for extreme heat countermeasures! A cool vest with cold water circulation. This new gear generates a comfortable cooling sensation as cold water from the tank circulates through hoses embedded inside the vest. The vest material is CORDURA®, chosen for its durability, making it suitable for demanding work environments. The water circulation is powered by a battery, allowing for approximately 7 hours of full-power operation when replenished with frozen water bottles or ice. When using frozen water bottles as a cooling agent, the melted water can also be used for hydration, providing an additional benefit for extreme heat countermeasures. Materials: Outer fabric: 100% Nylon Lining: 100% Polyester Side fabric: 80% Nylon / 20% Polyurethane Tank: TPU / Hose: Silicone rubber Cooling section: Aluminum vapor deposition, foamed polyethylene, polyethylene, PET Color: Black Size: F (fits M to 3L)