[Natural Latex] Our heavy resistance bands are made of 100% high-grade natural rubber to bear high tension. It will not break, safe and provide longer durability. | [For All Strength Level] Set of 4 pcs Pull up assist bands correspond to different colors, Red(5-10 lbs), Black(15-30 lbs), Purple (30-60 lbs), Green (60-100 lbs),81 inches in length and each color is different resistance and width for more training you want. | [Suitable for Any Workout] Our resistance bands offer effective training. These exercise bands are ideal for pull up assistance, adding resistances to press-up, speed training, bench press, squat to work out your arms, shoulders, chest, gluteus, legs etc. | [Your Movable Gym] The resistant bands set is portable and come with a waterproof bag for you to carry it anywhere, so you can use this resistance bands set to exercise, be it to your home, gym or even as you travel therefor you can continue with your work. | [Customer Friendly service] If you have any problems, please do not hesitate to contact us. We will provide professional service to solve your problem.