Leather upper with PK Wicking Mesh lining. Goodyear Welt Construction is sturdy and flexible. C.S.A. Grade 1 Approved, E.S.R. Rated. Steel Toe and Plate. Removable EVA Comfort Cushion insole. Oil and Slip Resistant Wolverine Rubber outsole with EVA midsole. 200 gms. Thinsulate Insulation for added warmth.