Leather Upper. Moisture Wicking Nylon Mesh Lining. BootBed(TM) Dual Layered Memory Foam Removable Footbed. Polyurethane Oil, Abrasion, Chemical & Slip-Resistant Outsole. Electric Hazard Rated. Designed for Mason, Concrete Workers, Construction Tradesmen, Iron Workers, Pipefitters, Steamfitters & Plumbers. ANSI/ASTM I/75 - C/75 - MT/75 Approved