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 circulates air to create a cool foot. Wolverine Rubber Aggressor DC-03 outsole. External Met Guard protects the foot from impact and compressionwhile resisting chemicals and heat.