The Hall's 351W boots are built for the climbing lineman. The arches are supported with left and right specific heavy duty triple ribbed steel shanks. These types of specialized shanks help create a platform under feet by spreading the load over a larger area. Water-resistant and breathable, the outer body is made with both full grain leather and denier nylon over a GORE-TEX® liner. A lace-to-toe design allows for a closer fit with more support and the Goodyear welt mounts this boot on the Vibram® Yellow Plug Tacoma lug outsole. Composite safety toe. The foot bed features a full length polyurethane insert that wick moisture to make boot cooler in summer and warmer in the winter. Made In USA Composite Toe meets or exceeds ASTM F2413-11 MI/75 C/75 EH EH (Electrical Hazard) Rated GORE-TEX® Breathable Liner Triple Ribbed Steel Climbing Shanks  Vibram® Yellow Plug Tacoma lug outsole   Hall's 10" Composite Toe Waterproof Lineman's Boot 351W