Gymnic Pink Gymnic and Physio-Gymnic Exercise and Play Ball sized 12 inch is used worldwide for gymnastics, exercise, push-ball/cage-ball play and balance therapy. Ball is fabricated from the thickest formulation of fine vinyl, using the seam-free roto-molding process. No seams means there is almost no chance for the ball to leak, except by puncture. Brightly colored and has raised latitudinal ribs that make it easier to hold onto during balance training, stretching or strengthening. Therapy Balls are ideal for home exercise programs. Physico-Gymnic Balls are built so tough, they’ve been rated to safety support 300 lbs. Latex free.