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

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, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." I'VE BEEN on a quest to find the ultimate base layers for cold weather for years now. As an avid skier ...

Which men’s base layers are best? Whether you live in a cold climate, plan on taking a trip to a chilly destination or just like to be prepared for the winter months, wearing a base layer is one of ...

The Icebreaker Merino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top is now $90 in this short-lived deal. Icebreaker, like contemporaries Smartwool and Darn Tough, is known for quality merino wool ...

The merino wool used to make this will keep you warm without making you overheat, and it’s naturally antibacterial, too. The minimal seams on this make it a chafe-free zone. The weave is highly ...

The Sportful Sottozero winter base layer isn’t the warmest option on the market and it won’t be for everyone. If you are someone who needs warmth but also builds up a sweat when climbing, this base ...