No more chasing after the ball – the retractable feet will keep it upright when not in use. The feet will retract into the ball when it is sat on, making it function like any other therapy ball. The non-slip, ribbed surface provides additional safety when used. The ball can be underinflated for a more ‘squishy’ feel, or fully inflated for a ‘bouncy’ feel. 26-inch balls can support up to 300 pounds.