Slow deflate ball tested up to 250 lbs. of dynamic weight and 1000 lbs. of static weight. Ideal for individual or group exercise programs to improve spinal mobility; strengthen the trunk, upper body and lower body; improve balance and coordination, and for stretching. Inflate with a hand or foot pump. Each ball comes with a full-color instruction poster and plug packet. See chart list below to determine which size(s) to order. Latex-free.