It's -20 C this evening. I'm thinking about all the animals that live in the wild. How do they survive? Yes, I know they are protected, but still I feel uncomfortable. I found undercoat from a hare in our garden in the spring a couple of years ago. It's warm. It's been used for mittens in Scandinavia in old times. The fibers are only about 2,5 cm long, but you can spin them into a soft, warm yarn on a supported spindle or with a long draw on a spinning wheel.