Our Booty Resistance Bands Have 3 Levels. Green-light(15-30lbs) for Beginner; Pink-medium(25-40lbs) for Intermediate; Purple-heavy(35-60lbs) for Athlete. Vertoda Exercise Bands Are High Quality, Made of Thickened Fabric with Non Slip Rubber Layer. Durable Elastic Material & No Rolling. Packed in a Portable Carry Bag, Convenient to Carry & Use It Anytime Anywhere, Home, Gym, Office. Park, Etc. It is Great for Leg Stretching, Warm Up, Yoga, Weight Lifting, Squatting, Pilates, Beach Body Training, Etc. with These Booty Bands, You Can Creat a Perfect Body Shape. & Exercise Improves You Overall Wellness. & They Are Wonderful Gifts to Your Family, Friends, Lovers for Christmas, Birthday or Other Special Days.