This product can tone your back muscles, reduce belly fat, improve blood circulation, and also improves your body posture. It increases the stamina, energy, and vitality of the body. The elastic resistance of the rubber training rope can be used to train and exercise in whichever way you want, according to your physical needs. Made with environment-friendly material, it is safe to use and carry. Colors may vary. Product features it is the premier fitness product for strength training and resistance training programs. This rubber pull string will help you get in better shape without the need for a gym membership or the risk of lifting heavyweights.