Exercise anti burst yoga ball with quick pump.This gym ball is big and thick and very soft. it has a size of 55cm diameter and it is very helpful during exercises and keeping fit at home or in the gym. According to how you may use it, you may get benefits such as reduced waist, beautiful and well shaped arms, reduced belly fat, massage and relaxation, relieved stress and so on. the ball's thickness makes it withstand any kinds of sharp objects that may spoil it. On receiving the ball, you will need to inflate it with a pump, do not worry, the pump is packed in the same box as the ball.