Splash resistant chrome tanned leather upper with moisture wicking lining. All other areas unlined for maximum comfort in hot conditions. Dual Density Rubber (DDR), anti-static soling system for the best durability and comfort. Shock absorbing heel and quick release, concealed fasteners for rapid removal in case of molten metal splash. Velcro fastening to padded suede collar for comfotable every day use. Heat resistant to 300 C. Deep cleated sole with ladder grip for sure footing.