Love these, never worn them because they aren’t quite heavy duty enough for winter where I live. Details: These shoes combine ThermoBall™ 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. Features: -Collapsible Heel With Elastic Side Panels For Easy On/Off -Oso Fleece Collar Lining For Added Comfort -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