Your feet work hard, so they deserve the warmth and comfort of the Men’s ThermoBall™ Traction Mules V. These shoes combine ThermoBall™ Eco insulation with high-traction rubber outsoles to make slip-ons that are ideal for base camp, après ski, or shuffling out to grab the morning paper. Upper: Recycled P.E.T. ripstop upper with non-PFC durable water-repellent (non-PFC DWR) finish to help keep feet dry Lightweight ThermoBall™ Eco insulation retains warmth even when wet Oso fleece collar lining for comfort Collapsible heel with elastic side panels for easy on/off Sole Unit: Outsole made with up to 20% recycled rubber Upper| Recycled P.E.T. ripstop upper with a non-PFC durable water-repellent (non-PFC DWR) finish for added water repellency ThermoBall™ Eco 100% recycled polyester insulation helps keep feet warm even when wet Sole Unit| Outsole made with up to 20% recycled rubber