The The North Face THERMOBALL™ Traction Mule II Slippers combine super-insulated, fleece-lined comfort with full-sheet rubber outsoles that provide reliable traction whether they're padding around inside or venturing outdoors. With their effortless slip-on design and versatile performance, these mules become the go-to choice for kids who want cozy warmth without sacrificing the ability to run outside at a moment's notice.