Heavyweight Men's Wool Crew Top - 100% Merino Wool

The Yukon is a 400 g/m2 Crew Neck designed to keep in body heat and be super comfortable as a base layer. The fine micron 100% Australian Merino Wool garments, part of our men's merino wool clothing, will rapidly wick away moisture during periods of high activity while preventing heat loss during inactive times. This piece is designed to be one of the warmest layering tops you will find. Whether you're wielding an ice axe on a near-vertical ice sheet or taking the dog for a walk on a cold afternoon this garment will perform to your satisfaction.

Pair it with our heavyweight merino wool thermal bottoms for a full cold-weather base layer system.

Fabric

• Fiber Content: 100% Merino Wool
• Knit: 400 g/m² Heavyweight Interlock Knit
• Microns: 18.5 Micron Fibers
• UPF Rating: 50+
• Total Easy Care: Machine Wash and Dry
• Wool Source: Australia
• Imported.

Total Easy Care Men's Thermal Merino Wool Shirt

Heavyweight Warmth for the Coldest Days

When the temperature drops to its lowest point of the year, Minus33's men's thermal Merino wool shirt is built to meet it head on. This heavyweight long sleeve is part of the Minus33 wool clothing lineup, designed to deliver serious warmth without sacrificing the comfort and breathability that Merino wool is known for. From working outdoors and hunting in the early morning cold to layering up for a winter expedition, this shirt is built to perform when conditions get demanding.

A Shirt for the Coldest Layers of Your System

This men's thermal wool shirt is designed to anchor a cold-weather layering system, sitting comfortably against the skin while providing the insulation needed for late fall and winter activities. It pairs naturally with the matching heavyweight bottom for full coverage during the most demanding conditions. From hunting and ice fishing to winter camping and everyday outdoor chores in freezing temperatures, this shirt is engineered to keep you warm through extended exposure to the cold, season after season, without losing its softness or overall performance. No matter how often you wear it outdoors, it will keep you at just the right temperature.

Get in touch with us today to learn more.

Features

• Neckline: Crew Neck
• Tagless Label: No Itchy Neck Tags
• Flat Lock Seams: Prevents Chafing
• Layer Type: Base Layer, Mid Layer
• Fit Type: Regular - Standard fit with a little bit of room to breathe, but not too baggy
• Model Features: The model in black is 5'10 / 150 lbs wearing a size medium
• Runs True to Size
• Weight: Size Large = 17 oz. (482 grams)
• Style #: 707

Uses

• Ideal Seasons: Fall, Winter
• Activities: Everyday Wear, Hiking, Camping, Biking, Running, Fishing, Hunting, Snowsports
• Temperature Recommendations: 0°F and below while active, 0°F to 30°F while inactive -  Learn more about Merino wool fabric weights

Care

Washing and Drying Instructions - Learn more about wool care

• Turn Inside Out
• Machine Wash Cold: Gentle cycle with like colors
• Detergent: Mild or wool-specific
• Tumble Dry: Low heat
• Storage: Place in an airtight container when not in use for long periods of time
• Do NOT Use: Fabric softener or bleach!

Product Story

Yukon [yoo-kon]

The Yukon is the westernmost and smallest of Canada’s three federal territories and a picturesque mountain range that includes 5 mountains over 15,000 feet. Notable rivers include the Yukon River, after which the territory was named, as well as the Pelly, Stewart, Peel, White and Tatshenshini rivers.

Frequently Asked Questions

How cold does it need to be to wear this men's thermal wool shirt?

This heavyweight shirt is best suited to conditions at or below freezing, making it ideal for the coldest stretches of late fall and winter. For milder weather, a lightweight or midweight Merino wool shirt from Minus33 would be a more appropriate choice, since the heavier fabric is built specifically for extreme cold rather than moderate temperatures throughout the year.

Can this men's thermal Merino wool shirt be worn as a standalone layer?

Yes. While this shirt performs well as a base layer in a more complex layering system, it can also be worn on its own during very cold conditions for activities like hunting, ice fishing, snow shoveling, or extended outdoor work, where insulation takes priority over breathability and airflow.

Does this thermal wool shirt pair with a matching bottom?

Yes. This shirt is designed to complement the matching heavyweight Merino wool bottom, giving you a complete cold-weather base layer system that covers your entire body during the harshest parts of the season.

What activities is this men's thermal Merino wool shirt suited for?

This shirt is well-suited to hiking, camping, hunting, ice fishing, and snow sports, along with general outdoor work in freezing conditions. Its heavyweight construction is built specifically for high insulation needs rather than high-output activity in milder weather, making it a dependable choice for the coldest days of the entire year.

Is the men's thermal wool shirt true to size?

Yes. This shirt runs true to size. If you prefer a closer, more athletic fit for layering purposes, sizing down is recommended. Those who want extra room to layer additional pieces on top may want to size up for added comfort and flexibility.