The Foremost Fitness Pro Ball by TheraGear is used by top professional trainers and athletes and is the industries standard for health clubs, studios, rebab and at home. Specially designed for your exercise with dumbbells, this ball has extra firm support and made with a very thick material for controlled movement during weight training. This ball has a textured no slip surface to prevent you from slipping off the ball and keeps you safe while performing exercises. TheraGear exercise balls are made with a special material that prevents the ball from dangerously exploding if accidentally punctured. Acrylic particles allow air to release gradually so Secure Max System balls deflate slowly - and safely. The Pro Ball is burst-proof up to 500 lbs and supports a static weight up to 2,200 lbs. All our Exercise balls are latex-free.