Full Grain Premium 2.2mm Cowhide Waterproof Leather Oil & Acid Resistant Outsole w/Non-Skid & Non-Marking Tread Side Zipper Entry w/ Adjustable Strap, Welt Construction Padded Upper w/ Milwaukee Signature Hardware Smart Mask Climate Control Insole w/Flex Power Toe Design 100% Waterproof Construction & Leather Treatment Linings are Moisture Wicking, Anti-Fungal, Anti-Bacterial