Full Grain Premium 2.2mm Cowhide Waterproof LeatherOil & Acid Resistant Outsole w/Non-Skid & Non-Marking TreadSide Zipper Entry w/ Adjustable Strap, Welt ConstructionPadded Upper w/ Milwaukee Signature HardwareSmart Mask Climate Control Insole w/Flex Power Toe Design100% Waterproof Construction & Leather TreatmentLinings are Moisture Wicking, Anti-Fungal, Anti-Bacterial