HR66 S3 HRO SRC Toe&sole steel Rubber sole Toe & sole steel Upper: grain leather Rubber Sole:Dual density polyurethane midsole, and vulcanized rubber outsole resistant to contact heat up to 300. Antistatic, resistant to oils and hydrocarbons. o High resistance to hydrolysis. High resistance to abrasion. Shock absorber system with shock-absorbing heel. High slip resistance. Maximum control. Thermal insulation at high and low temperatures.