Sketches, by Dr. Cameron M. Smith, of Restraint Layers of Pressure Garments Mark I, II, III and IV; Marks I-III are described below. Note reduction of bulk and number of through-fittings between Mark I and Mark III. The Mark IV garment was built in three months in 2015, based on years of experience with earlier models, and will be described later.

Between 2009 and 2013 Dr. Smith and the Pacific Spaceflight team designed and tested a proof-of-concept pressure suit rated to fly to 50,000 feet. After many successful tests, including underwater leak-detection, skydiving stability tests, and altitude chamber tests, we are confident of the essential design, which delivers breathing gas, maintains appropriate pressure, and regulates the pilot’s temperature. You can read more about these suits by clicking below: