The perfect, wear-anywhere footwear / Meet the original aprs adventure slipper from Acorn. Over 40 years young and still going strong, these slipper socks made their debut on shuttle missions aboard the International Space Station. How cool is that And they've been known to don the feet of sherpas in the Himilayan Mountains Whether you're camping in the Rockies or playing Monopoly, The Original Slipper Sock delivers cozy comfort. Crafted from Acorn's heritage ragg wool, a four-season, temperature regulating, sustainable and natural fiber, these slipper socks are perfect all-year round. The premium, multilayer Cloud Cushion memory foam insole and suede leather outsole keep feet protected.