1. Concave-convex serrations reduce the burden on the thumb
2. Press the cone surface to rub the skin
3. Material: thumb: Silicone, Resin: Resin
4. Size: thumb: 15.5x3.5cm, resin: 9.5x6.5cm, four corners: 68x63cm
5. Weight: thumb: 102g, resin: 57g, four corners: 95g
6. Features: small and portable, safe to carry
7. Purpose: massage the whole body to relieve soreness