Perfect size for everyone Large size of 27.5cm so you don't have to worry about not using the board and sliding it while training. A non-slip floor mat provides additional protection for the board and the floor.Material: Polypropylene resin (PP), non-toxic, odorless, tasteless, safe and durable.Effect: The spiral fat burning method, ten minutes a day, holds slim waist, legs, buttocks, removes fat, forms a perfect curve, can exercise at home.Strengthen your abs and core: You will feel stronger in your abs and back if you train them continuously by twisting and simply twisting them. And ultimately, you'll have more toner and a stronger stomach while you exercise.High-quality craftsmanship: Each Twister training board is made from high quality plastic with a textured, non-slip surface for added safety. We designed our rotating workout board with a balance board bottom, precise ball bearings and foot massage nubs that allow the waist twisters to spin smoothly on the spinning platform while enjoying the foot massage.