Gaiam Essentials Ab Wheel. The Gaiam Essentials Ab Roller Wheel provides a quick and effective ab workout. The ab wheel features a large textured non-slip wheel with perfectly smooth rolling glide and extra-strong sure-grip 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. Ergonomic, sure-grip handles. Large non-skid wheel. Easy-glide roller. Durable construction. Can be used on soft or hard surfaces. Includes foam knee pad with carry handle. Imported.