Three-eyelet Oxford made from the same soft, supple oil-tanned leather used in all of our boots, lined for maximum comfort and wear. Additional features include exclusive compression molded TPU (Thermoplastic Polyurethane) sole plus a removable Cambrelle innersole with contoured heel cup and arch support.. Slip Resistant - MARK II Machine tested slip resistant on oil, acid & water.. Anatomic Support System - Redbacks unique Anatomic Sole cradles the foot to reduce arch sagging and prevents foot strain, fatigue and related leg and back pain.. Electrical Hazard Safe - Our boot meets and exceeds ASTM F2413-11 standards for Electrical Hazards.. Commonly used by: Police, Fire, EMT/EMS, Auto Tech.