When designer Carolyn Yim isn’t wearing the merino leggings she designs for Ply–Knits, she swears by Patagonia’s Capilene thermals, which the brand calls its most versatile base-layer bottoms.

KEEP WARM AND DRY: Ultra soft fleece lined thermals for kids combined with moisture-wicking power can only mean one thing: Your little one is wearing Rocky fleece lined base layer kids underwear.

Fast forward to the 21st century, and the brand found its groove by focusing exclusively on thermal underwear and base layer products. Its waffle-knit thermals are the real deal, weighing in at ...

Here’s our pick of nine of the best thermals to snuggle up in this winter ... This all-in-one base layer offers the perfect blend of sleek style and comfort. It’s the obvious choice for ...

One of the most obvious places to start protecting yourself from the cold weather is a trusty set of base layers ... that create an additional layer of warmth. Worn in conjunction with a neck ...

When conquering the great outdoors, the right base layer can make all the difference. Smartwool, the Denver-based brand known for comfy thermals, socks and accessories, has upped the ante for ...

These understated fragrances (known as “skin scents” for their your skin-but-better quality) often contain clean, musky notes that function as a versatile base layer—think of them as the ...