Latex Resistance Bands Have Five Different Resistance Levels. Two Beginner Exercise Bands (extra Light & Light), One Intermediary Exercise Band (medium), & Two Advanced Bands (heavy & Extra Heavy Exercise Bands). Great for Yoga, Pilates, Injury Rehabilitation, Cross-fit, Fitness & Can Effectively Improve Muscle Strength & Overall Flexibility. Non Allergenic, Non-latex Resistance Bands. Robust, Resilient & Durable, with Excellent Elasticity, Elastic Workout Band Will Ensure the Best Exercise for Your Legs, Butt, Upper & Lower Body. Muscle Toning, Strength, Flexibility Improvement & Physical Therapy Are Just a Few Benefits of the Perfect Training.