High Quality Material: Resistance bands made from 100% high-grade natural rubber to prevents bands snapping and provide longer durability. Different Color & 4 Pull Up bands levels: Set of 4 pcs Pull up assist bands correspond to different colors, Yellow(5-10 lbs), Red(15-30 lbs), Black(30-60 lbs), Purple (60-100 lbs), 81 inches in length and can be used alone or combine multiple workout bands to increase the challenge. Suitable for Variety of Exercise & Multifunctional: Resistance bands offers effective training, suitable for a variety of exercise to Calorie Burning, Muscle Building and Fat Shredding Workout Program to work out your arms, shoulders, chest, gluteus, legs etc. Lightweight and portable: 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-out routine anywhere you go. Great ide