An Air Force orbital space station, the Manned Orbiting Laboratory (MOL), was to place a two-man crew in orbit for extended periods and allow them to work in a shirtsleeve environment. A series of suits were developed specifically for MOL crews. The MD1, MD2, MD3, and MD4 were full pressure suits, closed loop system, in 12 sizes, produced for the MOL definition program by David Clark and Hamilton Standard. The SPD-117, a prototype full pressure suit for the MOL definition phase, included a thermal garment and PLSS by ILC Dover and Firewell. The MOL program was cancelled in 1969. The