Unisex Arctic 3/4 Length Longs

Brynje USA

Arctic 3/4 Length Longs

$149.95 USD

5.0

Built to keep you dry, warm, and moving through cold, high-output conditions.

Color: Black

Quantity:

Brynje USA Arctic 3/4 Length Longs

$149.95 USD

Two technical layers combined for extended exposure to serious cold.

Arctic Double combines two Brynje systems in one expedition-weight garment. A polypropylene Super Thermo mesh layer sits directly against the skin, while a solid Merino wool layer covers the mesh. The inner layer moves moisture away and creates insulating air space. The outer layer stabilizes that warm air and continues moving moisture through the clothing system.

Best For

Polar Expeditions

Winter Camping

Hunting

Skiing & Snow Sports

Cold-Weather Work

Stop-And-Go Activity

Layer Type Dual-layer expedition-weight baselayer

Gender Unisex

Fabric Weight Inner mesh: 140 g/m²; outer Merino layer: 220 g/m²

Weight Varies by garment and size

Fit Notes Regular or close fit depending on style, with a long cut for dependable coverage. Tops, bottoms, and women-specific styles may fit differently.

Specific Measurements Varies by garment and size. See the size chart for product-specific measurements.

Construction Two-layer construction with Super Thermo polypropylene mesh next to the skin and a solid Merino-blend exterior. Inlays, collars, zippers, thumbholes, and coverage vary by garment.

Product Features Product-specific features vary by garment and may include high collars, zip ventilation, thumbholes, reinforced inlays, extended coverage, and other cold-weather details.

Origin Made in Poland

Material Inner Layer: 100% polypropylene mesh, Outer layer: 80% Merino Wool / 20% polyamide

Inner Layer Hydrophobic polypropylene open mesh

Outer Layer Solid Merino-blend knit

Merino Fiber 20.5-micron fine-medium Merino

Washing Wool or gentle cycle, maximum 85°F / 30°C

Care Notes Turn the garment inside out and close all zippers. Wash on a wool or gentle cycle with wool-specific detergent at a maximum of 85°F / 30°C. Do not bleach or use fabric softener. Reshape and line dry.

Fewer Washes Merino odor resistance supports airing between wears

Durability Polypropylene mesh and reinforced wool are built for demanding use

Repairability Small holes and damaged seams can often be repaired

Long Service Life Designed for repeated use in demanding cold-weather conditions

Made In Poland

Use Philosophy Air between wears, wash less, and repair when possible

Suggested Active-Use Starting Window

-20°F to 30°F

-29°C to -1°C

A practical starting window for extended cold exposure and mixed-output winter activity. Arctic Double combines a moisture-moving mesh layer with a solid Merino exterior, making it especially useful when activity alternates between hard movement and periods of rest.

Extreme Cold Cold / Active

-40°F -40°C

-20°F -29°C

30°F -1°C

50°F 10°C

Temperature windows are approximate, not safety ratings. Wind, precipitation, activity intensity, metabolism, altitude, exposure duration, shelter, and every additional layer can substantially change warmth and safety.

Find Your Perfect Fit

1. Select Garment Category

2. Select Fit Preference

3. Dial In Your Measurements

Your Recommended Size

MD Optimal Match

Why Arctic Double Works

Arctic Double combines two different fabric behaviors in one garment. The polypropylene mesh has very few contact points against the body and absorbs almost no moisture. Perspiration can move through the open cells toward the Merino exterior. The solid wool layer then covers the cells, stabilizing warm air and continuing to manage moisture as it moves outward.

That Means:

Less damp fabric resting directly against the skin

Insulating air space held beneath the Merino exterior

Moisture transport during high-output movement

Warmth maintained when activity slows or stops

Performance Layering Mechanics

Toggle between the modes below to see how the mesh manages moisture and warmth.

SYSTEM KEY

Water Vapor / Sweat

Body Heat

SKIN

OUTER LAYER

Next-To-Skin Only: Open mesh cells dump excess heat while channeling moisture vapor away from your skin.

+ CHAPTER 05 / COMMITMENT We don't do seasons. We don't do trends.

We make garments that last.

Repairable

Designed with construction methods that allow for easy repairs, extending the life of your gear for decades.

Timeless

Our aesthetic hasn't changed much since 1953. We focus on function over fashion cycles.

Tested

Every stitch is proven in the world's harshest environments before it ever reaches your back.