Warm and comfortable insulation is paired with a high-traction rubber outsole in the North Face Thermoball™ Traction Mule V , so that you can stay sure footed while popping outside for extra logs or giving your feet a break from your trekking boots at basecamp. A well thought out development of the classic Tent Mule, these outdoor slippers have tough fabric and high quality insulation both from recycled materials so that you’ll tread lightly on the planet as well as your floor. The collapsible heel feature means the Traction Mule V’s are quick and easy to pop on as a true mule style if you are in a hurry. North Face Thermoball™ Traction Mule V Features: 100% Recycled P.E.T. Ripstop Upper Primaloft Thermoball™ Eco Insulation Cozy-Oso Fleece Lining Collapsible Heel High Traction Rubber Sole