Baselayers

The Foundation of Every Layering System

Brynje baselayers use open mesh construction to move moisture away from the skin, create insulating air pockets, and help regulate body temperature across changing conditions and activity levels.

Find the Right Baselayer: Compare our materials, warmth levels, and best-use scenarios using the comparison tool below, or take our quick quiz for a personalized recommendation.

Find Your Perfect Baselayer

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Our gear experts are ready to help you nail your layering system.

Merino Mesh

For comfort, temperature stability, and natural odor control.

Wool Thermo -22°F to 41°F (-30°C to +5°C)
Exertion Level Low to moderate
Strengths Soft. Warm when damp. Odor-resistant.
Fiber 80% Merino - 20% PA - 17.5 micron
Best For Hiking, Daily wear, Travel

Most merino brands don't mesh-knit. The yarn has to be stronger and the gauge tighter. We've never made it any other way.

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Synthetic Mesh

For high exertion, extreme cold, and serious sweating.

Super Thermo -22°F to 59°F (-30°C to +15°C)
Exertion Level High to extreme
Strengths Dries in minutes. Zero water weight gain.
Fiber Schoeller Polycolon - 100% PP
Best For Ski-tour, Ultra, Polar, Rescue

The original 1976 formula. SINTEF named it best in test in 1988. Every Norwegian polar expedition since has worn it.

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+ Still Can't Choose?

Arctic Double Knits Them Together

Synthetic mesh inside, merino outside, knit as one two-layer garment. Still our bestseller since 1997.

Temperature Range -40°F to 23°F (-40°C to -5°C)
Exertion Level Low to moderate
SHOP ARCTIC DOUBLE →

Mesh Knit

Permanent air gap creates a micro-climate to prevent saturation. Essential for high output.

Solid Knit

Traditional, maximum surface-to-skin contact. Best for warmth in low-output, static conditions.

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47 products

Super Thermo A-Shirt – White – front
Super Thermo A-Shirt Sale price$59.95 USD
Color
Wool Thermo Light Longs Base Layer - Women's – Black
Color
Traditional Light Cotton T-Shirt Base Layer – White – front
Color
Super Micro T-Shirt Base Layer – White – front
Super Micro T-Shirt Base Layer Sale price$59.95 USD
Color
Wool Thermo Light Long Sleeve Shirt - Women's – Black – front
Color
Classic Merino Wool Men's Boxers Base Layer
Color
Super Micro Shirt
Super Micro Shirt Sale price$69.95 USD
Color
Wool Thermo T-Shirt Baselayer - Women's – Black – front
Color
Super Thermo T-Shirt Base Layer w/Inlay - Women's – Black – front
Color
Super Micro C-Shirt Base Layer – White – front
Super Micro C-Shirt Base Layer Sale price$54.95 USD
Color
Tactical Wool Thermo T-Shirt – Olive Green – front
Tactical Wool Thermo T-Shirt Sale price$94.95 USD
Color
Tactical Classic Shirt – Tactical Grey
Tactical Classic Shirt Sale price$134.95 USD
Color
Nikwax® Basewash®
Nikwax® Basewash® Sale priceFrom $9.50 USD
Classic Wool Light T-shirt
Classic Wool Light T-shirt Sale price$89.95 USD
Color
Tactical Classic Longs – Tactical Grey
Tactical Classic Longs Sale price$134.95 USD
Color
Wool Thermo Light T-Shirt Base Layer - Women's – Black – front
Color
Tactical Classic T-Shirt – Tactical Grey
Tactical Classic T-Shirt Sale price$104.95 USD
Color
Classic Wool T-Shirt – Black
Classic Wool T-Shirt Sale price$104.95 USD
Color
Classic Wool Light T-Shirt - Women's – Navy – front
Color +1
Classic Zip Polo Base Layer – Black
Classic Zip Polo Base Layer Sale price$164.95 USD
Color
Wool Thermo T-Shirt Base Layer – Off White – front
Wool Thermo T-Shirt Base Layer Sale price$84.95 USD
Color
Classic Wool T-Shirt Women's – Chianti
Classic Wool T-Shirt Women's Sale price$104.95 USD
Color
Wool Thermo Women's Zip Polo – Black
Wool Thermo Women's Zip Polo Sale price$139.95 USD
Color