Manufactured to ISO 20345:2004 S4 and AS/NZS 2210.3:2009 Class 1 safety standards and CE rated Heavy duty PVC upper with PVC sole, nylon lined inside Kick off spur on heel for easy removal, self-cleaning sole Sole resistant to solvents, oil, acid, alkalis & fats Reinforced ankle, heel and instep for optimum support Very flexible composition - resistant to cracking