Solid and Hard-wearing: Our long heavy resistance bands are made of natural latex material, non-toxic, no odor, anti-slip and curled, our pull up assistance bands will not break, safe and multifunctional, please rest assured to use Wide Applications: This professional exercise bands comes with 4 different levels of resistance. Black(8-15 lbs), Green(15-35 lbs), Red(25-65 lbs), Blue(35-85 lbs),. They are very suitable for beginners, fitness enthusiasts, athletes and other people Multifunctional Workout Bands: They are perfect for you to learn pull-ups, ring droops and muscle ups. They are ideal for body resistance training and physical therapy to help strengthen ligaments or muscle tears, and are ideal for exercising arms, back, legs and buttocks Anywhere to Use: These resistance bands for working out are light weight and takes up little space, you can exercise at any time and at home, go to the gym, office or even on the road Quality Assurance: Our aim is to provide customers with better elastic bands for exercise, you can get what kind of products you spend, if you have any questions about the fitness bands, please feel free to contact us