4 Resistance Levels Bands For More Efficient Training Multiple Uses and Portable Rehabilitation and Improving Flexibility How to choose the right resistance bands in your workout Red (15-35lbs): This exercise bands for general warm-ups,stretching and for anyone new to resistance training or pilates. Black (25-65lbs): This workout bands for general fitness training, rehabilitation, stretching, jumping, speed training, aerobics and for adding progressive resistance to weight training exercises. Purple (35-85lbs): This pull up bands for assisted chin-ups and pull-up assist bands, biceps curls, calisthenics, stretching. Green (50-125lbs): This gym bands are the choice for larger weight training exercises, stronger bench pressers and movements involving the lower body, calves, quads, hamstrings and glutes. Durable Natural Latex Material Resistance bands are made from natural latex and it's strong and durable materials built to last. The 4 different bands provide different tensions so as you get stronger you can move up to a stronger band . Workout your arms, back, shoulders, legs, and so on. Portable & Lightweight Workout Bands For easy portability, these pull up bands resistance bands come with a small carrying bag, which easily fits into any handbag and make it possible to exercise anywhere and anytime: office, school, business trips, vacations, hotel, gym. A Nice Gift This pull up bands kit has absolutely everything you need, with gift box, it is a great birthday gift, holiday present and anniversary gift ideal for your friends, family and loved-one. There's always tension on the band, the muscles get a great workout in a large range of motion. Now enjoy sport with your family, friends.