Merino 250 Baselayer Crew - Men's
Out of Stock
Don't worry though, we have a lot more Men's Midweight Long Underwear Tops in stock than that.
Shop Similar ProductsWarmth meets comfort with the Smartwool Merino 250 Baselayer—soft, breathable, and adventure-ready.
Smartwool's best-selling and warmest baselayer, the Merino 250 Baselayer Crew, got an upgrade with flatlock seams and seamless shoulders, boosting mobility and minimizing chafe. Whether we're touring the backcountry or lapping the resort, we stay comfortable and fresh with the soft and smooth fibers regulating our body temp, letting our skin breathe easy, and fending off odors.
Details
- Warm baselayer crew that can be worn alone or layered
- Toasty baselayer for your frigid on-mountain pursuits
- Merino wool construction for optimal thermoregulation
- Flatlock seams reduce friction for comfortable movement
- Smooth shoulder panels increase pack-wearing comfort
- Slim fit reduces bulk for layering ease
- Item #SWLZ86T
- Material
- 100% merino wool
- Insulation Weight
- midweight (250gsm)
- Fit
- slim
- Center Back Length
- [medium] 27.5in
- Style
- crew
- Anti-Odor
- natural attribute of merino wool
- Claimed Weight
- 9oz
- Activity
- skiing, snowboarding, winter camping, mountaineering, hiking
- Manufacturer Warranty
- 2 year
Reviews
Q&A
Overall Rating
4.5 based on 18 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.Customer Images
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Selecting an option will reload the available reviews on the pageJanuary 6, 2025
Excellent
- Familiarity:
- I've used it several times
I am very happy with the fit and quality of this garment
Originally reviewed on Backcountry.com
January 1, 2025
Love the design and the brand but fail
- Familiarity:
- I've put it through the wringer
I have a ton of smart wool clothing. This one immediately got a hole in it.
Originally reviewed on Backcountry.com
December 30, 2024
Checks all the boxes ☑️☑️☑️
- Familiarity:
- I've used it once or twice and have initial impressions
Great fit, style and warmth. Small criticism; color, in ad, looked more cadmium than the ochre it is.
Originally reviewed on Backcountry.com
December 23, 2024
Love these shirts
- Familiarity:
- I've used it several times
Merino wool that can be machine washed and dried is the best. I have a bunch of these for daily wear and love this one with slightly higher weight.
Originally reviewed on Backcountry.com
October 9, 2024
Can't go wrong with Smartwool.
- Familiarity:
- I've used it several times
As always the merino 250 baselayer is consistent with previous purchases. Keeps me warm from Georgoa to Norway. Worth the full price as well.
Originally reviewed on Backcountry.com
September 15, 2024
Smartwool Merino 250 base layer
- Familiarity:
- I've put it through the wringer
Perfect base layer to wear under a 3 layer Gore Jacket in winter in the mountains.
Originally reviewed on Backcountry.com
March 24, 2024
Great Baselayer
- Familiarity:
- I've put it through the wringer
I bought one of these in January and skied for six weeks trying various layers to stay warm and still have the best mobility. The best combo was an under armour short sleeve short, the Smartwool baselayer and a Free Fly Bamboo Heritage fleece. Even at the coldest temps I was warm. I bought two more of these Smartwool baselayers.
Originally reviewed on Backcountry.com
March 5, 2024
Great base layer
- Familiarity:
- I've used it once or twice and have initial impressions
Bought this for a ski week at Big Sky. Love Smartwool and this is no different. Very soft and comfortable. Lightweight but still very warm. Wore it 3 days straight and still no odor. Love it!
Originally reviewed on Backcountry.com
June 21, 2023
Great baselayer
- Familiarity:
- I've put it through the wringer
I have (2) Smartwool250 base layers. I use them backcountry backpacking. In warmer weather I use one for my evening wear/sleeping. Last year on a cold weather trip I used the second one as a daytime shirt. They keep me warm and don't pick up odors after a week of backcountry wear. Love them.
Originally reviewed on Backcountry.com
December 29, 2022
Excellent second layer
- Familiarity:
- I've put it through the wringer
Perfect as a pajama top to wear around the house and as a second layer over a snug fitting next to skin layer. I typically wear a Patagonia capeline mid-weight base layer under a smart wool 250
Originally reviewed on Backcountry.com
November 18, 2020