This Ab Roller Wheel & Mat from Gaiam will provide a quick and effective ab workout, right at home. The ab wheel features a large textured non-slip wheel with a perfectly smooth rolling glide and extra-strong no-slip handles for steady motion and control. The roller glides easily on nearly any surface and comes with a supportive foam knee pad, so you can work your core just about anywhere. It can be used on soft or hard surfaces and includes a foam knee pad with carry handle for comfort and convenience.