Our resistance band is made of 100% natural latex, ensuring comfortable and durable, which can be repeatedly used and stretched. Whether you are just started exercising or an experienced warrior, you can make them perfect. This light band is great for beginners, and our medium, heavy and extra heavy bands are aimed at more intermediate and advanced strength training(it could be customizable about other size).These stretches are not only suitable for sports and fitness, but also for physical therapy. They also suitable for pregnant women to exercise pelvic floor muscles and keep their bodies in shape. whether you are at home, office, gym or travel, you can do the exercise anytime, anywhere.