Waterproof winter boots with double velcro and removable felt insulating liners. Comfort zone: -40°C/-40°F Details Waterproof synthetic leather and tear-resistant water-repellent nylon. Seams on the upper sealed with the H2O Seal process. Double strap, hook-and-loop closure. High-visibility reflective inserts. Wide opening for easy on and off. Removable, soft insulating felt liner. Removable insulating felt insole that traps moisture. Ultra-light EVA base, waterproof, flexible, and insulating. Synthetic rubber sole, non-marking, lightweight, anti-slip, and prevents accumulation.