The Arctic Pro allows the hunter to focus on what's important. This boot's 8mm neoprene and fleece lining assures warmth in low temperatures. Like most Muck boots, a topline binding keeps the snow and cold out. Features: 100% Waterproof 8mm Neoprene Bootie for Comfort and Performance Warm Fleece Lining Bob-Tracker Molded Outsole Comfort range (-60F_-30F) Shaft Circumference: 17in Boot Height: 17.56in Muck Men's Arctic Pro Boots