“You want fibers that retain heat, which means, historically, are wool and – believe it or not – silk,” says Young, although these have largely been replaced by todays synthetic. However, if you want to stay warm, wool will do the trick. It’s lightweight, durable, and water-resistant, which means you’ll stay dry in the event of rain or a blizzard. Young says Merino wool, the wool raised by merino sheep, is softer than regular wool, and wicks away sweat – making it a good choice to wear on a winter morning walk. Just check the tag to make sure the jacket is mostly wool; some lighten it and include most other materials, like nylon and spandex.
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