Full Grain Premium 2.2mm Cowhide Waterproof LeatherOil & Acid Resistant Outsole w/Non-Skid & Non-Marking TreadSide Zipper Entry w/Plain Toe Design, Welt ConstructionShifter Abrasion Protection w/ Milwaukee Signature HardwareSmart Mask Climate Control Insole w/ Flex Power Toe DesignLinings are Moisture Wicking, Anti-Fungal, Anti-Bacterial