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How do people keep warm in winter? Many people wear coats, but coats can be inconvenient when you travel by car. You have to take them off when you get in and put them on again when you get out. That’s why many businessmen wear vests under their suit jackets. These days, there are thin vests that are very warm because they are made of down (duck feathers). There is also electric clothing for people who are active outdoors. I met someone who was wearing an electric top (like a thin sweater). It was powered with a battery. He really liked it because it kept him very warm. (by Douglas Jarrell)
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