injection molded pvc with triple density technology (tdt) resists degradation from many harsh chemicals; seamless and 100% waterproof; graduated height reduces chafing and irritation on the calf foot form contour cushion insole provides arch and heel support, and is removable, washable and replaceable; extended ribbed steel shank for support tdt self-cleaning outsole is made of a special compound for longer wear and slip-resistance; yellow midsole stripe indicates steel toe presence steel toe protects against impacts from above; extra thick toe and heel guards protect against knocks and wear; electrical hazard rated outsole; astm f2413-11 m 1/75 c/75 eh recommended use: food processing, petrochemical and farming Included components: Product & Instructions Guide