The Wonder Core Smart is a fitness breakthrough that will put you on your way to a stronger core and shredded abs. Whether you are looking to strengthen for a sport or tone for bikini season, this item is sure to impress. The Wonder Core Smart exercise system is designed to provide a laser focus on your upper, middle and lower abs and oblique muscles for a well-rounded workout you will feel all over. It is a fitness accessory that no household should be without.