This all-purpose winter boot features an improved fit while retaining reliable Heatseeker warmth and exceptional grip. Upper: Waterproof-leather upper. DryVent waterproof construction keeps feet dry. 200 g Heatseeker insulation for exceptional warmth. Streamlined, waterproof, formed-rubber shell increases flexibility. formed footbed traps air and retains warmth. Rustproof hardware. Sole Unit: Compression-formed EVA midsole for long-lasting cushioning. Gaiter and snowshoe compatible. Durable TNF Winter Grip rubber outsole. IcePick temperature-sensitive rubber lugs for increased traction. Shaft: height 6.25″ (15.88 cm) / circ 10.25″ (26.04 cm). Approx Weight (1/2 pair): 1 lb 8.7 oz (700 g).