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

"I sat in 15-degree temps…stayed warm, comfortable, and dry." ...

There’s no doubt that merino wool is an insulating rockstar among outdoorsmen and women. Thanks to its warmth, breathability, moisture-wicking, and odor-repelling performance, it has a massive fan ...

Performance fabrics are typically petroleum-derived, like polyester and nylon. But Merino wool is an eco-friendly, natural alternative that’s not only insulating and temperature regulating but also ...

A good merino base layer might be an investment, but it's certainly worth it for its temperature-regulating, moisture-wicking properties that keep you comfortably warm and dry. Whether you're an ...

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

Like the socks this brand built its reputation on, the Smartwool Merino 150 base layer uses Merino wool – a material that's often used for outdoor apparel, being breathable yet warm, and naturally ...

A good merino base layer might be an investment, but it's certainly worth it for its temperature-regulating, moisture-wicking properties that keep you comfortably warm and dry. Whether you're an ...