The CAT Crossrail Safety Boot is a work boot made from full grain leather combined with Ultra work compound outsole and cement construction to provide you with a durable boot. Specifications ASTM F2413-11 I/75 C/75 Steel Toe Full grain leather upper Nylon mesh lining Nylex PU sock liner Poured PU mid-sole Ultra Work Compound out sole Cement construction Slip Resistant Electrical Hazard rated