Ariat Men's Groundbreaker Pull-On Steel Toe Work Boot 100% Leather, Nylon Imported Duratread sole Shaft measures approximately 10" from arch Platform measures approximately 0.75 inches Boot opening measures approximately 15" around Full grain leather foot with a variety of upper options 4LR Four-layer footbead for comfort Round Toe Profile Mesh Lining Heavy duty oil and slip resisting outsole Safety toe is ASTM F2413-11 M/I/75 C/75 EH rated