TheraBand Professional Latex Resistance Band Loop Set for Lower Pilates, Crossfit, Yoga, Stretching, Physical Therapy, Strength Training without Weights, Toning Workouts, Portable Fitness 3 inch wide continuous loop elastic bands in the same colors and resistances as authentic TheraBand System of Progressive Resistance improves strength & flexibility in glutes, knees and hips Ideal for a variety of exercises, particularly lower body exercises to increase strength & balance The continuous loop provides a comfortable alternative to tying flat Resistance Bands into loops Rehabilitate muscles and increase flexibility through simple yet effective workouts to increase strength & improve motion Four color-coded resistance levels are available in this size, Yellow-3 lbs-4.3 lbs. are best for rehabilitation and those beginning an exercise program, Red-3.7 lbs-5.5 lbs. also for light resistance training