YELLOW rubber across toe for extra protection from wear and tear. Shovel Strap across bottom where shank is,extra protection to keep shank in place from working way loose. Toe Tap on heel for easy off toe to heel. Puncture-Resistant steel plate in bottom to keep nails,glass or sharp objects from going through to foot. 400 grams of thinsulate insulation. THE SHOVEL GUARD; HEAL GUARD; YELLOW RUBBER DOWN THE SIDE OF BOOT5, SERVE ALSO FOR MINER CABLE WEAR.