Dressed For Safety - Protected Against Liquid Rocket Propellants -- This unorthodox-looking protective clothing was designed by U.S. Air Material Command engineers to take the danger out of liquid rocket propellants for the men who must handle them. An outer shell of white mercerised cotton fits over a coverall and hood assembly made of vinyl-impregnated fiberglass. To avoid overheating, the outer shell can be saturated with water. Demand-type air breathing apparatus is used. April 19, 1951. (Ph