Soft, resilient, lightweight, and easy to grip, Over Ball comes flat, ready to inflate by mouth with the straw provided. Inflates between 7 1/2″ and 9″ diameter. Less inflation makes the ball easier to grip and squeeze. Under inflated the ball can be sat on. Fully inflated the ball offers resistance and can be thrown at full strength without fear of it hurting anyone it hits. Made of strong, durable polyvinyl chloride Over Ball is latex-free, BPA-free, and phthalate-free. Suitable for indoor and outdoor play, Over Ball is a favorite of physical therapists. Assorted pastel colors. Available singly or in a 3-pack.