Amazon reviewers can vouch for the toastiness of these long johns and other base layers.

There’s no excuse not to go outside with these warming, sweat-wicking base layers from Carhartt, Eddie Bauer and more.

The best kept secret about my winter wardrobe — until now, I guess – is that half of it is invisible. Between December and March, I rarely leave the house without a base layer (or thermal underwear, ...

Save on bestselling snowstorm-ready base layers, like Uniqlo's Ultra-Warm long-sleeves, turtlenecks and leggings that ...

The Assos Winter LS Skin Layer P1 most comfortable base layer I've worn but with a premium price tag. You can trust Cyclingnews Our experts spend countless hours testing cycling tech and will always ...

The best cycling base layers make a real difference on the bike, especially in winter. They trap warmth and wick moisture to keep you dry and comfortable on cold rides. I like to pair a long-sleeve ...

It’s easy to get all starry-eyed about a new shell or even a slick, kitted-out bib, but savvy skiers know that true comfort on the slopes starts next-to-skin. Your choice of base layer directly ...

We updated this article in September 2022 to add more information about each featured product, based on extensive research done by our team. You can still get outside safely when temperatures ...