4-layer 9 mm ThermoPlus™ felt liners (removable for easy drying) andcrafted waterproof rubber bottoms for long-lasting wear (Aerotrac™ rubber lug outsoles) Worn ONCE before I moved to a place that apparently doesn't ever get snow! Make me an offer! $200 new (If this appeared as "sold" previously, that's because I'm new to this and don't know how to edit my other listing! First buyer cancelled their order before I shipped, realizing it wasn't the size they needed)