Our Loop bands are made of 100% natural latex, non-toxic and eco-friendly, which is durable and skin-friendly. Come in 4 different resistance levels. Light and medium bands are tailored for beginners, heavy and x-heavy thick bands are great for more intermediate and advanced strength training. Use single leg bands or combine multiple bands to find your ideal resistance level. You can use these fitness bands in your shoulders, hips, arms and legs to improve your muscle strength, physical activity ability and flexibility.