1. CST 2. Electric shock prevention, 3. High quality 4. Rubber Characteristics: antiskid, electric shock prevention, pierce resistance, flame-retardant, heat protection and break resistance.Material: Polythene rubber, steel cap and steel inner sole.Bottom of steel plate pierce resistance ≥1000NWithstand voltage ≥5000VWeight: 2.8kg/pairIt is comply strictly with the China standard GA6-2004, by ...