Muck Boots Arctic Sport Mid High Performance Sport Boots - Men's Black/Black 8. Offering both support and comfort these insulated boots have a contoured midsole and warm fleece lining with thermal foam under the footbed. The 5 mm neoprene in these men's snow boots offers numerous benefits: it's waterproof it absorbs shock retains heat and prevents chafing by adjusting to the natural contours of the feet. These men's winter boots with molded lugs are built with a fully-sealed rubber shell that extends high above the ankle for extra protection when walking in deeper snow. Specifications for Muck Boots Arctic Sport Mid High Performance Sport Boots - Men's: Manufacturer: Muck Boots Gender: Male Age Group: Adults Men's Shoe Width: Medium Boot Style: Winter Boot Color: Black Footwear Type: Winter Boots Activity: Winter/Snow Weight: 2.5 lb Fabric/Material: Rubber Footwear Upper Fabric/Material: Rubber/Neoprene Insole Material: Thermal Foam Water Resistance Level: Waterproof Lining Material: Fleece Insulation: Fleece Outsole Material: Slip-Resistant Rugged Midsole Material: EVA Activity/Occasion: Outdoor Work Features of Muck Boots Arctic Sport Mid High Performance Sport Boots - Men's Stretch-fit topline binding snugs leg to keep warmth in and cold out 5mm NEOPRENE bootie with four-way stretch nylon 100percent waterproof lightweight and flexible Fleece lining 2mm thermal foam underlay added to the instep area for additional warmth EVA molded midsole with contoured footbed MS-1 molded outsole is rugged aggressive and durable for maximum protection and stability Package Contents: Muck Boots Arctic Sport Mid High Performance Sport Boots - Mens Muck Boots ASM-000A-BLK-080: Arctic Sport Mid High Performance Sport Boots - Men's Black/Black