Yukon Heavyweight Men's 100% Merino Wool Crew
Named for the Yukon—Canada's westernmost territory and a picturesque mountain range featuring five peaks over 15,000 feet—this heavyweight crew is designed to be one of the warmest layering tops you'll find. The 400 g/m² construction keeps body heat in while the fine 18.5-micron 100% Australian merino wool rapidly wicks moisture during high activity and prevents heat loss when you're standing still. 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.
Why You'll Love This Base Layer
- 100% merino wool for natural warmth, moisture wicking, and odor resistance
- Heavyweight 400 g/m² interlock knit—our warmest base layer
- 18.5-micron fibers feel soft against skin with no itch
- Crew neckline with tagless label for irritation-free comfort
- Flatlock seams prevent chafing during all-day wear
- Works as base layer or mid layer in your system
- UPF 50+ sun protection
Size & Fit
Regular fit with room to breathe but not baggy. Available in XS-4XL in both regular and tall lengths. Runs true to size. Reference model: 5'10", 150 lbs wears size Medium.
Regular Sizes:
- XS: Chest 33-35", Sleeve 30-31"
- S: Chest 35-38", Sleeve 31-32"
- M: Chest 39-41", Sleeve 32-33"
- L: Chest 42-45", Sleeve 33-34"
- XL: Chest 46-48", Sleeve 34-35"
- XXL: Chest 49-52", Sleeve 35-36"
- XXXL: Chest 52-54", Sleeve 36-37"
- 4X: Chest 54-57", Sleeve 36-37"
Tall Sizes:
- MT: Chest 39-41", Sleeve 35-36"
- LT: Chest 42-45", Sleeve 36-37"
- XLT: Chest 46-48", Sleeve 37-38"
- 2XT: Chest 49-52", Sleeve 38-39"
- 3XT: Chest 52-54", Sleeve 39-40"
- 4XT: Chest 54-57", Sleeve 40-41"
Care Instructions
Turn inside out and machine wash cold on gentle cycle with mild or wool-specific detergent like M33 Nikwax Wool Wash. Tumble dry on low heat. Store in an airtight container when not in use for extended periods. Never use fabric softener or bleach.
Complete Your Look
Pair with the Katmai heavyweight bottoms for a complete extreme-cold base layer system. Explore our full Merino Wool Collection from Minus 33, a 5th-generation New Hampshire family business with over a century of textile expertise.
Yukon Heavyweight Men's 100% Merino Wool Crew
Named for the Yukon—Canada's westernmost territory and a picturesque mountain range featuring five peaks over 15,000 feet—this heavyweight crew is designed to be one of the warmest layering tops you'll find. The 400 g/m² construction keeps body heat in while the fine 18.5-micron 100% Australian merino wool rapidly wicks moisture during high activity and prevents heat loss when you're standing still. 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.
Why You'll Love This Base Layer
- 100% merino wool for natural warmth, moisture wicking, and odor resistance
- Heavyweight 400 g/m² interlock knit—our warmest base layer
- 18.5-micron fibers feel soft against skin with no itch
- Crew neckline with tagless label for irritation-free comfort
- Flatlock seams prevent chafing during all-day wear
- Works as base layer or mid layer in your system
- UPF 50+ sun protection
Size & Fit
Regular fit with room to breathe but not baggy. Available in XS-4XL in both regular and tall lengths. Runs true to size. Reference model: 5'10", 150 lbs wears size Medium.
Regular Sizes:
- XS: Chest 33-35", Sleeve 30-31"
- S: Chest 35-38", Sleeve 31-32"
- M: Chest 39-41", Sleeve 32-33"
- L: Chest 42-45", Sleeve 33-34"
- XL: Chest 46-48", Sleeve 34-35"
- XXL: Chest 49-52", Sleeve 35-36"
- XXXL: Chest 52-54", Sleeve 36-37"
- 4X: Chest 54-57", Sleeve 36-37"
Tall Sizes:
- MT: Chest 39-41", Sleeve 35-36"
- LT: Chest 42-45", Sleeve 36-37"
- XLT: Chest 46-48", Sleeve 37-38"
- 2XT: Chest 49-52", Sleeve 38-39"
- 3XT: Chest 52-54", Sleeve 39-40"
- 4XT: Chest 54-57", Sleeve 40-41"
Care Instructions
Turn inside out and machine wash cold on gentle cycle with mild or wool-specific detergent like M33 Nikwax Wool Wash. Tumble dry on low heat. Store in an airtight container when not in use for extended periods. Never use fabric softener or bleach.
Complete Your Look
Pair with the Katmai heavyweight bottoms for a complete extreme-cold base layer system. Explore our full Merino Wool Collection from Minus 33, a 5th-generation New Hampshire family business with over a century of textile expertise.