NWT Evergreen /black Size 10 men’s US Warm and comfortable THERMOBALL™ insulation pairs with high-traction rubber outsoles to make these slip-on booties ideal for base camp, après ski or shuffling through the snow to grab the morning paper. Easy On/Off Design Sole Unit: Outsole Made With Up To 20% Recycled Rubber Thermoball™ 100% Recycled Polyester Insulation Helps Keep Feet Warm Even When Wet Upper: Upper Made With 100% Recycled P.E.T. Ripstop With A Non-PFC Durable Water-Repellent (Non-PFC DWR) Finish For Added Water Repellency