First sold in 1984, the Steele Body Cooling Vest offered the first real solution to heat stress, the manufacturer says. Rigorous independent testing performed by various military agencies showed significant physiological benefits in wearing the SteeleVest. SteeleVest was subsequently supplied to the entire U.S. Naval fleet as well as the Royal British fleet. A smaller, lighter vest, The Steele Cool-UnderVest™, is now available which can be worn under uniforms, protective clothing, and body armor.Steele, Inc.,, (888) 783-3538.