Standard version: Six-proof wear-resistant and anti-fouling cat scratch leather + 14 cm 50D high-rebound violet sponge + 2 cm imported washed latex from Thailand; Flagship version: contact surface 2.2mm first layer cowhide + 16cm 50D high rebound violet sponge + 3cm imported washed latex from Thailand; Upgraded version: Six-proof wear-resistant and anti-fouling cat scratch leather + 16 cm 60D high rebound violet sponge + 2 cm imported washed latex from Thailand; Extreme version: 360-degree full coverage, 2.2mm first-layer cowhide + 16cm 60D high-rebound violet sponge + 3cm imported washed latex from Thailand