INCREDIBLE CORE TRAINER: 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. TOTAL BODY WORKOUT: 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. ALL SURFACES: Double sided for all surfaces. Polished plastic side is used down on carpet/rugs, foam side down on hard wood/laminate floor. Mind you. Using a wrong side scratches your floor.