Daniel Green slippers are great for indoor/outdoor wear and the wool upper make this slipper both warm and breathable. In the 1800's Daniel Green was a young traveling salesman in New York for the Wallace Elliott Company. While visiting the Dolgeville felt factory he noticed the factory workers wearing shoes crafted from felt. The workers wore these in order to keep their feet cozy and warm in the cold stone factory. Later, Daniel Green and his brother began making shoes and slippers and sold over 600 pair in 1882 ...The rest is history.