Fitball 15" Seating Disc, Irridescent BlueThis 15" air-filled disc has a unique dome-shaped top that mimics the FitBALL exercise ball. One of the most versatile fitness and rehabilitation tools available, the FitBALL® Seating Disc can be used as a standard balance disc or as an active sitting seat cushion. Iridescent blue color.
Bought the Fitball on recommendation of my chiropractor. It really helps me to keep my spine straight while at the computer or working. Mimics sitting on a ball.