Roller with Assist Coil: Abs roller can trigger your body (shrink muscles) but it is very hard to pull up your stretched body. The power roller core is designed with an assist coil built into the body to support your body and help you train your abs

Two Large Rollers: Equipped with a large roller on the front and back of the main unit. You can train back and forth with stability without having to flatten or pull your body

Non-slip Grip: Comes standard with a high quality non-slip grip. It does not slip even when you sweat your hands and gives you a firm grip

High Density Mat: Includes a 0.4 inch (10 mm) extra thick knee mat. Train comfortably without hurting your knees