Caterpillar STREAMLINE RUNNER  CCT - Work and Safety Shoes SR - Slip and Oil resistant Rubber sole Molded PU foam footbed for underfoot comfort  Soft, breathable nylon mesh sock lining  T1484, Durable rubber outsole for traction CCT - Carbon Composite Toe  EH - Electrical Hazard  NM - Non-Metallic (NM) Streamline Runner CCT, Black/Yellow (P91489)