Our product picks are editor-tested, expert-approved. We may earn a commission through links on our site. Why Trust Us? LET'S BE FRANK: Thermal underwear is arguably the least sexy type of ...

These base layers prevent sweat buildup and protect against the cold, whether you’re working outside or hitting the slopes.

If you ask us, there's nothing better than a pair of thermal underwear that moves when you move. The REI Co-op Midweight base layer bottoms are ideal for our active guys who are constantly ...

Cyber Monday is almost over and there are plenty of last-minute deals from REI you can take advantage of. As a commerce editor for NBC Select, I frequently write about REI and know the ins and ...

When the wintery weather rolls around, layering up with thermal underwear is a smart choice to stay snug. Our UK collection of womens thermal underwear is crafted from insulating materials that trap ...

Thermal underwear (formerly known as “long johns”, now elegantly called “base layers” or “thermals”) can be an absolute lifesaver. Throw them on under a pair of sweatpants or winter-weight jeans to ...

Check out the 10 best products to pack light for a cold winter vacation, from space-saving jackets to thermal layers and cozy ...

Everyone else is lying to you, pulling the wool over your eyes. REI doesn't do a Black Friday or Cyber Monday sale. At least not in name. There's a Cyber Deals sale this week, with some new ...

If you buy something, we may earn an affiliate commission. REI may not officially put on a “Black Friday” sale, but it sure puts on a good Cyber Week sale. The REI Cyber Monday sale is ...

— Recommendations are independently chosen by our editors. Purchases you make through our links may earn us and our publishing partners a commission.