Mens 8" Waterproof 800G Insulated Grizzly Boot. A rugged, heavy-duty work boot made with 800 grams of insulation for cold weather applications. Also available in a composite safety toe. Kharthoum Cigar Leather Upper. Waterproof SCUBALINER™. Taibrelle Lined. 800 Grams of Thinsulate™ Insulation. Removable AG7™ Polyurethane Footbed. Electrical Hazard Rated. Triple-Rib Steel Shank. Welt Construction. Rubber Lug Outsole