A shopper declared, "The best I have found. I have had this ball for 2.5 years now and use it regularly. It stays fully inflated (easily weeks between needing to add any air), is durable, and has the ...

for the stomach, back, buttocks and thighs. Has great firmness, tension and stability. How to use it: Sit on or balance against this ball to perform a series of exercises aimed at toning stomach, back ...