A double-ribbed steel shank provides added stability for the foundation of this pull on work boot.The composite NanoToe™ cap on this comfortable protective toe work boot is an incredibly light toe cap while still maintaining the ASTM F2413 impact and compression standards for protective toe work boots. Georgia Boot Carbo-Tec LTX Waterproof Composite Toe Pull On Boot This composite toe waterproof work boot additionally meets ASTM 2413 electrical hazard standards.