We get it, sometimes the change in weather is just a little too much to handle and you don't want to give up wearing sandals. Luckily, the Birkenstock Arizona Shearling Lined Slippers mean you don't have to give up baring your toes. Birkenstock has lined their most popular sandal with soft shearling sheepskin, meaning you'll have an effortless slip on with all the warming qualities of your favorite winter shoe. Whether you think it's genius or insanity, it's genius.