Prototype High Altitude Flying Outfit. Prototype partial pressure suit by David Clark to integrate altitude, thermal, immersion, chemical defense and anti-G protection, Non-conformal (Dome Type) full pressure helmet with oxygen mask.

• Sears, William J, A Historical Review of Partial and Full Pressure Suits, . Accessed at: http://webpages.charter.net/mcelwain/PSUITS-Chronology.htm.