The 10 Best Men's Merino Wool Long Underwear

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This wiki has been updated 29 times since it was first published in February of 2017. The advantages of Merino wool include powerful moisture-wicking properties, elasticity, odor control, and longevity. It is noticeably different from other wool because of the extra-fine fibers that make it particularly pleasant against the skin, while remaining durable. All of these qualities mean the fabric is well-suited for cold climate garments, and especially for long underwear. When users buy our independently chosen editorial recommendations, we may earn commissions to help fund the Wiki.

1. Minus33 Kancamagus

2. Meriwool Thermal Shirt

3. WoolX X705

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Editor's Notes

September 26, 2020:

Comfort, style, and durability were our top priorities in selecting our men's merino wool long underwear. We also aimed to include a good mix of lightweight, medium weight, and heavy choices for a range of climates, along with both separates, and sets.

The WoolX X705 caught our attention because they have ankle cuffs that make them easy to slide beneath ski pants or jeans and dry quickly after washing. Unfortunately, the WoolX Explorer LS Top does poorly in the wash, developing pills and holes quickly, so we removed it during this update. The Jockey 8530 earned a place thanks to their strategically-placed seams throughout the thighs and rear that improve flexibility.

We also add the Minus33 Kancamagus and the Meriwool Base Layer, both of which come in several colors ranging from muted to bright. The Sportown Full-Length have a dated look and fit, so we took those off the list during this update. We appreciated the tailored look of the Meriwool Thermal Shirt and the Minus33 Ticonderoga, both of which work equally well as an outer layer.

Wanting to provide a full outfit for those seeking extra warmth from their neck down to their feet, we added the Lapasa M31 Set. Those needing something on the thicker side for seriously cold climates might like the WoolX X705.

October 22, 2018:

Updated with modern men's fashion options and a focus on sustainable textile manufacturing choices.

Special Honors

L.L. Bean Men's Cresta Wool Midweight Base Layer Bottoms The L.L. Bean Men's Cresta Wool Midweight Base Layer Bottoms have a comfortable fine-gauge knit and flat-lock seams that shouldn't itch or chafe. They have been gusseted to allow for a good range of motion, have a functional fly, and snug ankle cuffs for sliding into pants, but, unfortunately, they only come in black.

Wuru Wool 7/8 Tech Baselayer Pants The Wuru Wool 7/8 Tech Baselayer Pants are designed to feel like a second layer of skin, moving with the body, and showing almost no bulk beneath other clothing. They come in grey, black, and red, and have a comfortable and stylish thick waistband. While they are mostly merino wool, they do contain a small percentage of spandex and nylon.

4. Minus33 Ticonderoga

5. Meriwool Base Layer

6. Icebreaker Everyday

7. Smartwool 150 Bottom

8. Sheep Run Thermal Pants

9. Jockey 8530

10. Lapasa M31 Set

Brett Dvoretz
Last updated by Brett Dvoretz

A wandering writer who spends as much time on the road as in front of a laptop screen, Brett can either be found hacking away furiously at the keyboard or, perhaps, enjoying a whiskey and coke on some exotic beach, sometimes both simultaneously, usually with a four-legged companion by his side. He has been a professional chef, a dog trainer, and a travel correspondent for a well-known Southeast Asian guidebook. He also holds a business degree and has spent more time than he cares to admit in boring office jobs. He has an odd obsession for playing with the latest gadgets and working on motorcycles and old Jeeps. His expertise, honed over years of experience, is in the areas of computers, electronics, travel gear, pet products, and kitchen, office and automotive equipment.

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