Disco Sit for Balance and fitness one side is spiked

Introducing the Disco-Sit for back and postural therapy.
The Disco-Sit is perfect for seniors or anyone who is
uncomfortable getting on a gymball. Experience many
of the same benefits of a gymball for performing lower
back, pelvic stabilization, and weight shift exercises.
Dyna-disc can be stood on for lower extremity balancing.
Also can be used also for circulation at a desk or in a car.
Available in green, blue, red and black. Inflatable with a
standard needle and pump.