Synthetic rubber is also divided into wear-resistant rubber, environmental rubber, air rubber, viscous rubber, hard rubber and carbon rubber. Wear-resistant rubber has excellent wear resistance and toughness, so it is very durable. This rubber material is generally used on the soles of tennis shoes. Also known as recycled rubber, this rubber outsole contains up to 10% recycled rubber, mainly for environmental protection.

Hard rubber is the most comprehensive rubber among the rubber materials of the outsole. It is tough, anti-slip and wear-resistant. It is naturally widely used. Multi-functional shoes and basketball shoes are mostly made of this rubber outsole.