1. Auto Rebound Design: Abdomen roller adopts an auto rebound technology, with an intelligent brake system and spring technology, making the rebound smoother and easier. 2. Double Wheel: Has a wide front and back double wheels, which allows for rolling and better control, making it perfect for beginners and experts alike 3. Excellent Workmanship: Constructed with stable and eco friendly plastic, with a sponge handle that is non slip, sweat absorbing, comfortable, fade resistant and durable, while also giving you longer workout times. 4. Training: Help both men and women shape their muscles, which will keep you in better and flattering shape and increase your charm. 5. 5 Layers: Abdomen roller is made of 5 layers of slip resistant material, including anti slip layer, reinforcement layer, shock absorbing layer, noise reducing layer and support layer. Spec: Item Type: Abdomen Roller Material: PP, metal How to Use: Direct use PackageList: 1 x Abdominal Wheel 1 x Cell Phone Holder 1 x Kneeling Mat 2 x Hand Support Pads 2 x Support Tubes 1 x Instruction5 Layers: Abdomen roller is made of 5 layers of slip resistant material, including anti slip layer, reinforcement layer, shock absorbing layer, noise reducing layer and support layer. Auto Rebound Design: Abdomen roller adopts an auto rebound technology, with an intelligent brake system and spring technology, making the rebound smoother and easier. Excellent Workmanship: Constructed with stable and eco friendly plastic, with a sponge handle that is non slip, sweat absorbing, comfortable, fade resistant and durable, while also giving you longer workout times. Training: Help both men and women shape their muscles, which will keep you in better and flattering shape and increase your charm. Double Wheel: Has a wide front and back double wheels, which allows for rolling and better control, making it perfect for beginners and experts alike.