Dual-Sided Core Sliders (7" in Diameter), EVA environmental protection materialPremium Quality, Durable, Lightweight and Portable, Ideal for Worldwide Travel4 colors to choose from. Fit The Smooth (Plastic) Side for Carpets or Other Blanket, and The Foam Material Side for Hard Floor, Grass, tilesWood or Tile. Provides you an intense abdminal workout, perfect for both man and women to improve their fitness, ideal for a variety of different workouts, such as strength training, yoga, an aerobic or dance workout, Pilates, muscle shaping, recovering from an injury or even just like to keep fit at home. Simple and Comfortable to Use the 2 Core Sliders, Your Hands or Feet Never Leave The Floor, Which Offers an Incredible Core Workout Low-ImpactandWeight-Bearing Exercise. Great for Building Your CoreandAB Strength, Range of Motion and Stability. Body shaping and transformation Strengthen core strength Smooth and wear-resistant Suitable for soft ground to improve sliding fluency