Suit to simulate reduced gravity, 1965

Gravitttttt

From a photo gallery at LIFE, titled "NASA's Most Excellent Outfits":

"A suit designed for the Reduced Gravity Walking Simulator located at the Lunar Landing Facility (in 1965). The purpose of this simulator was to study the subject while walking, jumping, or running. Researchers conducted studies of various factors such as fatigue limit, energy expenditure, and speed of locomotion."

NASA's Most Excellent Outfits