Leather upper with PK Wicking Mesh lining. Techni-Flex Goodyear Welt Construction is both sturdy and flexible. C.S.A. Grade 1 Approved, E.S.R. Rated. Steel Toe and Plate. Removable Green Fit Dual Density, Anti-Microbial Insole. Wolverine Rubber Aggressor DC-03 outsole. Internal Met Guard allows greater comfort and flexibility while providing extra protection to the top of the foot.