Apollo Operations Handbook Extra Vehicular Mobility Unit : 9781937684860 : 15 Apr 2012 : The result of eighteen years of design and research, the A7L and A7LB spacesuits served during the Apollo, Skylab and Apollo-Soyuz missions. Designed by International Latex Corporation (ILC) Dover and with a life support backpack provided by Hamilton Standard, the A7L featured a water-cooled undergarment, an inner blue pressurized layer, and a tough white nylon outer hull. After the disastrous Apollo I fire, ILC produced a version that utilized beta cloth that is fire resistant up to 650 degrees Celsius. Two basic versions of the suit were used during Apollo: an EV A7L configuration for the command module pilot (CMP) that provided low pressure and fire protection as well as protection for free-space EVA, and the EV A7L PGA configuration that provided additional protection from the lunar surface environment. Apollo 7-14 used the A7L design that provided six hours of primary and thirty minutes o