Warming system: 200g 3M Thinsulate keeps your feet warm and dry even when the temperature is -25F. 3M Thinsulate provides about 1½ times the warmth of down and about twice the warmth of other high-loft insulation materials, when equal thicknesses are compared. Waterproof material: Men snow boots features waterproof construction for waterproof and windproof, and synthetic toe cap for anti-collision. Durable and slip resistant: The sick rubber outsole is more stable, slip and abrasion resistant, and flexible response to various outdoor terrain. Perfect for outdoor & indoor: Designed for both daily life in winter and outdoor sports like skiing, snowmobiling, ice fishing, outdoor party, and so on. What you get: Friendly customer service, NORTIV 8 is an American brand that aims at providing high-quality outdoor shoes. UPC 192623154489 192623737422 192623073704 ASIN B07SZ8GVX8 Brand NORTIV 8 Color Grey/Black Pattern Solid Seasons Winter Heel Type Flat Toe Style Closed Toe Model Name 170410 Style Name 170410 Item Weight 200 Grams Closure Type Zip Manufacturer NORTIV 8 Style Number BB-2-B1-170410-GREY_BLK-SZ-11-0 Sole Material Rubber Boot Form Type Hiking Boot Outer Material Rubber,Suede Insole Material Ethylene Vinyl Acetate Material Fabric Microfiber Shoe Height Map Ankle-High Boot Shaft Height Ankle liningdescription Faux Fur Shaft Circumference 13 Inches Water Resistance Level Waterproof