100% Natural Latex DIFFERENT POWER LEVELS: There are 6 different resistance levels of professional resistance loop bands: 5-15 lbs, 15-35 lbs, 20-45 lbs, 25-65 lbs, 35-85 lbs, 50-125 lbs. So it is suitable for the public such as beginners, fitness fanatic, Olympic athletes SAFE AND MULTIFUNCTIONAL: Resistance bands offers effective training. Perfect for learning pull ups, chin ups, power training. Workout your arms, back, legs, and butt all at once with mobility band, perfect for for body resistance training and yoga, physical therapy to help strengthen torn ligaments or muscles DURABLE AND NATURAL: All pull up bands are made of 100% natural latex, Non-toxic, no odor, anti-slip and curled, it's safe and durable, Our exercise bands improve comfort and wear-resistant performance without losing its elasticity after being used for a long time ENTERTAINMENT AND PORTABLE: Our fitness bands with an user manual and a portable bag, so you can easily know how to use it and carry it to the gym, office, home or take it on your trip. Take your portable bag now and bring your friends to start exercising