Inner rubber layer: Made primarily of natural rubber, polyurethane rubber, and other composite rubbers, enhanced with special reinforcing agents.

· Skeleton layer: Reinforced with fiber fabric (canvas) or synthetic fiber fabric (rope yarn) or copper-plated steel wire, offering good flexibility and strong pressure-bearing capacity.

· Outer rubber layer: Made from natural rubber and composite rubber, it is wear-resistant, anti-oxidation, has a long service life, and delivers a clear visual effect.