The Lydtran Resistance Bands are made of high-quality synthetic rubber, which is durable, stretchable, and non-toxic, providing you with a safe and comfortable exercise experience. The bands are suitable for all fitness levels, from beginners to advanced users. They are lightweight and portable, making them easy to carry and use anywhere. The Lydtran Resistance Bands Set includes five different resistance levels, allowing you to gradually increase the intensity of your workouts as you become more comfortable. The bands are color-coded, making it easy to identify the resistance level you are using. The package also includes a carrying bag, making it convenient to store and transport the bands. Whether you are working out at home, in the gym, or on the go, the Lydtran Resistance Bands Set is a great way to improve your strength, flexibility, and overall fitness.