Designed to strengthen and tone the upper and lower body, the ZoN Deluxe Exercise Ball is an ideal accessory for just about any workout routine and has the added safety and security of a padded, adjustable handle strap. The ZoN Deluxe Exercise Ball has an adjustable, padded handle strap that make the ball easier to grasp and hold during workouts. This feature enhances your strength and endurance by helping you isolate specific muscle groups during resistance training because the hand gripping muscles are less active. Makes a great alternative to metal free weights.