【Natural Latex Material】- The Exercise Bands are made of high-quality natural latex material, with a smooth and bright appearance, non-toxic and skin-friendly to the human body. They do not deform during stretching, are uniformly stressed and do not break easily. 【5 Different Resistance Levels】- AITUSI Resistance Bands for Exercise Working Out Physical Therapy includes five colors representing different tensions (X-Light, Light, Medium, Heavy, X-Heavy). Great for those just starting out or experienced fitness enthusiasts, they will all be perfect. 【Perfect for Any Workout】- These Resistance Bands can be integrated seamlessly with various popular workout programs. Great for physical therapy, gym, yoga, pilates, stretching, strength training and more.