1. TPR soft material, healthy and environmentally friendly, smooth and does not hurt the hands, good elasticity, non-toxic and harmless 2. A variety of kneading posture, relieve pressure, venting emotions 3. Slow rebound, comfortable feel 4. Simulation modeling, lightweight and portable, easy to clean 5. Material: TPR 6. Size: about 10cm 7. Weight: about 123g