Status: Operational 1934.
The suit was made of several layers of canvas and rubber, with a metal collar to fit a cylindrical metal helmet with square view ports. Colonel Mario Pezzi and Marquessa Carina Negroni wore the suit in their attempts to reach altitudes over 6,000 m, including a record altitude flight to 15,500 m by Negroni in 1937. The suit was electrically heated and even had metal alloy restraint devices to prevent ballooning.
Pezzi later achieved a record height of 17,004 meters in a specially-configured Caproni Ca 161bis (extended chord wings, huge four blade propeller, supercharged engine). However the suit was not used on this record since Pezzi was in a special pressurized hull within the biplane aircraft.