NF0A3UZN The North Face Men's ThermoBall Traction Mule V Warm and comfortable ThermoBall Eco insulation pairs with a high traction rubber outsole to make this slip-on ideal for base camp, apres ski or shuffling through the snow to grab the morning paper. Upper Durable, water-resistant, 100% recycled P.E.T. ripstop upper PrimaLoft ThermoBall Eco synthetic insulation Cozy Oso-fleece lining Collapsible heel with elastic side gore panels for easy on/off Sole Unit 40% recycled rubber outsole for supreme traction