Total Core with EVA or PVC seat very good quality Material: Steel,EVA/PVC,Foam,ABS Accessories: IB,CD,timer,ball,pump,rope Total Core ... then guides you through a smooth, full range motionThe Total Core abs starts with a jerking motion, which causes stain on the ... properly supported. The secret behind Total Core is the unique, progressive resistance system that ‘pushes’ you upward with more of a ‘push’ ...