Leather Upper. CK Wicking Mesh Lining. Goodyear Welt Construction. C.S.A. Grade 1 Approved, E.S.R. Rated. Green Fit insole. Oil and Slip Resistant Rubber Outsole. Polyurethane Midsole. Composite Toe with Flexible Wellman Flex 5 Fabric Plate. 400 gms. Thinsulate™ Insulation.