Effective. Experience a visible body transformation! Low impact on joints in low-frictional weight-bearing workouts. Break body adaptation and burn fat to reveal leaner, flatter abs. Improve agility, stability, coordination. Matching. To perform core slider exercises you need only a sleep-bag-size place. 2 sliders spice up home gym, aerobics, calisthenics, street workout, etc. User friendly for beginners, big guys, lifestyle builders and rehab. Smooth sliders engaging your core. 2 sizes. Regular 7” Rec for defining your abs. The xl 9” Rec for intense workout, quick reps, large hands and feet. Tone and sculpt muscles that are hardly used. Slippery-proof. Come with a printed instruction and an e-book for reference. Showing how to use at will and how to prevent hands/feet from slipping off. Tone muscles and have control of your body. Double sided for all surfaces. Polished plastic side is used down on carpet/rugs, foam side down on hard wood/laminate floor. With the portable bag you can carry sliders anywhere at ease. Mind you. Using a wrong side scratches your floor.