Sup-R-Safe Balls are made without a skin coating or foam inside The ball is formed from foamed vinyl; a vinyl that is stronger than a coating and will not absorb water or peel off. Sup-R-Safe Balls are made without seams that can split. Trapped within the vinyl are microscopic air bubbles that provide a high-tactile surface. Inflated through a standard athletic ball valve. Available in 7 different types.