The North Face Youth THERMOBALL Traction Mules size 2 The Kids’ THERMOBALL Traction Mules combine super-insulated, fleece-lined slip-ons with full-sheet rubber outsoles that provide traction indoors and out ThermoBall 100% recycled polyester insulation helps keep feet warm even when wet Collapsible heel with elastic side panels for easy on/off Cozy fleece lining in good condition from smoke and pet free home