Thermal Baselayers

The phenomenal success of our Heat Holders® socks has led to the development of additional Heat Holders® products. Our Baselayers, available in various colors and sizes, will keep you warm on those cold winter days. Choose a style to buy now or narrow your selection to Men's or Women's styles.

Women's Baselayers & Thermals

Patra silk thermals: As seen on the big screen?

The 6 Best Base Layers in 2024 – Long-Sleeve Running​ Shirts

Plain Black PE Thermal Base Layer Top

Best Baselayers of 2024

Men's Baselayers & Thermal Clothing

Thermals & Baselayers - First Ascent

Thermal Seamless Base Layer Top - Black

The Best Base Layers for Women of 2024

Thermals For Women, Womens Baselayers

Thermal Base Layer

Ridgeline Merinotech Thermal Baselayers

Thermal Baselayers – Whistler Sports

Men's Baselayers & Thermal Clothing

Women's Cold Weather Base Layer Thermal Leggings

MerinoMIX ACTIVE Long Bottom Base Layer - Men – KOMBI ™ Canada

Simon Safety - Portwest B131 Thermal Base Layer Leggings - Size Large

Men's Base Layer Thermal Leggings

Base Layers & Thermal Underwear Made in USA • USA Love List