Rated to -25°F/-32°C. All-weather waterproof insulated winter boot. 2.0-2.2mm waterproof full grain leather upper. Double adhesive latex seam sealed construction. 200 gram Thinsulate insulation. Dry-lex fleece collar and tongue lining. Anatomically engiineered, injection moulded waterproof TPU shell with fore foot flex grooves. Injection moulded shank plate with dual density X-2 footbed. EVA midsole. TNF Winter Grip rubber outsole.