The resistance band is made of TPE, which has high elasticity and is not easy to break. There are a total of 5 colors for fitness bands, including yellow (5-15lbs) for beginners or light stretching exercises, red (15-35lbs) for moderate intensity training and shaping, blue (25-65lbs) for advanced training, purple (35-85lbs) for endurance training, and green (50-125lbs) for strength training. Different colors correspond to different intensities of exercise bands, and different exercise bands can be selected according to different exercise intensities and purposes. Fitness resistance bands are suitable for all fitness levels and can be used for various exercises such as stretching, body shaping, rehabilitation training, etc. In addition to the 5 pull-up straps, there are also free door anchors, handles, climbing buckles, and instructions provided. You can fix the door anchor on the door or other stable place for paddling. The handle can provide you with a more comfortable grip, and the manual can provide you with suggestions for use and exercise. The training belt set is suitable for both men and women, and the portable drawstring storage bag can be carried with you, allowing you to exercise anytime at home, in the gym, outdoors, or in the office. Multi functional exercise: The elastic bands for exercise can be used for pull up, yoga, stretching training, physical therapy, etc. They can also be used with the provided door anchor and handle for more exercise options High-quality TPE: Our thick resistance bands are made of high-quality TPE material, which gives the workout bands good elasticity and stretchability, and the pull up assistance bands will not break even with prolonged use 5 Color workout Bands: Different color gym bands correspond to different exercise intensities, including yellow (5-15 pounds), red (15-35 pounds), blue (25-65 pounds), purple (35-85 pounds), and green (50-125 pounds) Suitable for everyone: These resistance bands are suitable for both men and women, helping to enhance fitness and body shaping. Our resistance bands set is also suitable for all fitness levels, and different intensities can help you make progress at different stages Portability: The included carrying bag makes it easy to store the resistance bands, door anchor, and handles, making it easy to carry with you, start your workout anytime. Please feel free to contact us if you have any questions, and we will do our best to solve them for you