From a merino wool base layer to viral HEATTECH fabrics, these thermals provide extra warmth without the added bulk.

Add Yahoo as a preferred source to see more of our stories on Google. This is my favourite base layer for winter — and it's only $30 (Photos via Kayla Kuefler & Uniqlo). Uniqlo's HEATTECH Crew Neck ...

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

Powder aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. Remember a few years ago, when everyone seemed to be switching to ...

It’s officially cozy season, so it’s the perfect time to shop for a new set of the best base layers to wear under your ski clothes or winter hiking outfits. However, with so many options and a wide ...

This is one of the heavier-weight base layers that we've tested, and as such it makes a good extra warming as well as wicking layer for when the worst of the winter weather kicks in. The greater ...

The best base layers for women building a smarter winter system. Why what you wear next to your skin matters more than bulky coats.

As the name suggests, this 100 percent merino wool base layer from EDZ weighs in at 190g, and is indeed white. The superfine merino wool is comfortable and soft against the skin. You can start to feel ...

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. There are a lot ...

The PAS Normal Thermal Long Sleeve Windproof Base Layer is a well-designed piece that already would have gotten my praise. The openings for helmet straps integrated into the hood though, that's genius ...

While researching antimicrobial and antibacterial fabrics for a recent project, I quickly realized why merino wool (wool from the merino sheep) is such a popular fabric for outdoors and performance ...