Wolverine’s steel toe boots meet or exceed American Society for Testing and Materials (ASTM) standards for impact and compression resistance. The unique wide flange keeps the toecap from sinking into the outsole. Beneath the flange, a tuckboard anchors the toecap to prevent movement under pressure. Efficient Thinsulate® is an insulation that offers low bulk insulation and dries quickly. Made up of thousands of tiny microfibers that trap insulating air, Thinsulate® Insulation provides increased protection from the cold and retains its insulating characteristics even when wet.