Single-density outsole and dual-density outsole for safety shoes, protective shoes, protective shoes
Single density double density refers to injection safety shoes, protective shoes, protective footwear production process is different.
Single density is just one dose, which is only a layer of polyurethane, density.
Dual-density injection twice, shoes had two stories, a layer called the end of General density is relatively small, relatively soft, plays a cushioning role. The floor below, called big bottom, density, more wear-resistant. Dual-density shoes more comfortable.