Specifically designed for workers in the delivery industry, the 5366 Non Metallic Uniform shoe from WORX/Red Wing features full-grain leather and 400-gram Thinsulate Ultra insulation. A non-metallic toe cap/safety toe will not set off metal detectors in airports. Safety features include ANSI Z41 ratings and extra scuff protection at the heel and toe.WORX by Red Wing Shoes, Red Wing, MN. ASSE BOOTH 325