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The sign which accompanied the Mark IV pressure suit.

It read

Mark IV Pressure Suit

Beginning in 1949, the U.S. Navy supported the B.F. Goodrich Company's development of the full pressure suit initiated by Wiley Post. Improvements were made which reduced bulk, increased mobility, and provided for effective ventilation.

In 1959, the Mark IV pressure suit was accepted by the U.S. Navy as a high-altitude emergency suit.

A few years later, a modification of this suit was chosen for America's first six space travelers, the Project Mercury astronauts.

Construction: Exterior-nylon. Interior-bladder of chloroprene on nylon fabric.

Developed and manufactured by B.F. Goodrich Co.

From National Aeronautics and Space Administration