... resistance, energy absorbent,high temperature resistant,impact resistance PVC Safety Boot with Steel Toe for Mine Material:virgin PVC ... ISO 20347:2007 ISO9001:2008 Comfortable, durable and protective safety bootsReinforced ankle, heel and instep designOne-time injection ... acids, alkali, some chemicals, oil and fats.Applied Industry: oil fields, mine, metalwork, chemicals, medicine, construction