Ariat Men's Groundbreaker Moccasin H2O Steel Toe Work Boot 100% Leather Imported Synthetic sole Shaft measures approximately 10.5" from arch Boot opening measures approximately 15.5" around Waterproof Pro construction with waterproof full grain leather foot ATS Advanced Torque Stability technology with composite forked shank Moc Toe Profile Mesh Lining Heavy duty oil and slip resisting Duratread outsole Waterproof Pro Safety toe is ASTM F2413-11 M/l/75 C/75 EH