The characteristics of Aramid UD are light in weight and high in strength.Its strength is five to six times that of steel wire, and modulus is two to three times that of steel wire or glass fiber, and toughness is twice that of steel wire, while weight is only about one fifth of steel wire. It has good insulation and anti-aging properties, can extend a long life.While reducing the burden of the weight worn on the head, it ensures good anti-ballistic performance and increases the protective area of the helmet.