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SmartWool NTS 250 Base Layer Bottoms - Merino Wool, Midweight (For Men)

Item #8723Y
$49.99 Save 47% Compare at $95.00
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About SmartWool NTS 250 Base Layer Bottoms - Merino Wool, Midweight (For Men)

Closeouts. From SmartWool's NTS (Next to Skin) collection, SmartWool's NTS base layer bottoms feature the undeniably soft, performance-ready power of pure merino wool with a midweight, insulating design that keeps you cozy for cold-weather layering.


Specs about SmartWool NTS 250 Base Layer Bottoms - Merino Wool, Midweight (For Men)

  • Base layer weight: Midweight
  • Inseam: 33" (based on size 2XL)
  • Fabric: 100% merino wool
  • Care: Machine wash, tumble dry
  • Made in Viet Nam
  • Visit our Layering Guide
  • US shipments only


Smartwool Mens Size Chart

Chest 36 - 38 39 - 41 42 - 44 45 - 48 49 - 51
Waist 29 - 31 32 - 34 35 - 37 38 - 40 41 - 44
Hip 36 - 38 39 - 41 42 - 44 45 - 48 49 - 51

Note: Measurements are in inches.


Do you own this product? Write a review and help others with their buying decisions!

4.823529 5 Overall Rating: 4.8 Based on 17 reviews

Most Helpful 5-Star Review

Amazing price, good fit, and most of all warm.
Verified Buyer Reviewed by esp from Georgia on Monday, March 23, 2015
Purchased for husband for deer hunting. Good fit, plenty of stretch, wool warm and breathable. Excellent price.
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  • Nice!
    Reviewed by Crowinghen from WA on Monday, March 19, 2018
    I usually buy Icebreaker merino wool, but couldn't pass on these with STP's great deal. PLus my IB's are a little thin and delicate, so I purchased these. I am a woman, bought the men's Medium and they fit okay ( not super glamorous, but hey they are longjohns. The waistband is a little iffy- it's wide and I feel like if I am not careful it will roll or get twisted, so I am careful. Very soft and warm these are great for cold weather activites or even pj's.
  • Smartwool Comfort
    Verified Buyer Reviewed by Boundary Waters Hunter from Wisconsin on Sunday, December 10, 2017
    I enjoy the true fit of these bottoms and how comfortable they are. This layer helps in keeping me warm on stand when hunting and when it gets real cold I will layer with the 150's then put these over the top of them. Their moisture wicking ability & odor elimination is a huge plus.
  • Great Product
    Verified Buyer Reviewed by NCGator from North Carolina on Tuesday, November 14, 2017
    Great base layer for any outdoor activity in the winter months - keeps you warm, keeps the moisture away and is lightweight.
  • Lovely pants
    Verified Buyer Reviewed by Zhang from Orgen on Monday, October 30, 2017
    Great blend of cotton-wool fabric, nice cut and color,.
  • Better than expected
    Verified Buyer Reviewed by OrangeCrush from Colorado on Wednesday, October 25, 2017
    Would definitely recommend. Warm and soft. Used while wading cold mountain rivers.

Question & Answer

Questions about this product? Get answers from community and staff experts.

  • “Hi!
    Can these be worn by itself to bed at night during Cold, WINTRY nights?
    Mens size 36 is a large so will this shrink considering it's mostly merino wool? Generally wash warm then low-med heat dry.

    Asked by MrMojo from New England on 10/21/2017 8:46:20 PM
    • Hello!, you can wear it to bed itself. I wash it in machine cold water and just laying it flat to dry to prevent shrinking.
      I hope this helps.

      Answered on 10/21/2017 10:53:37 PM by Mia from NY
    • I have worn these winter camping near the Canadian border, and they do a great job as a second base layer. During the many nights I have slept while camping there, I have never worn these by themselves under my 4-in-1 military sleeping system. I always had at least two more layers on both my legs and torso. That's when we're talking -30 F temps sleeping in a regular tent.

      As for the sizing, I have a 33" waist and I got an XL, which turned out to be a bad idea - but not too bad. It was just a little too loose, and still is after many uses and washes. So I got a large and it fit me perfectly. I use just the regular cycle on an HE washing machine with the temperature setting on warm/cold. I always hang dry my merino wool stuff though. I would imagine that low heat would be the way to go if you do decide to dry it.

      In short, I would probably go with the XL if your waist size is 36.
      Answered on 10/22/2017 9:56:04 AM by Seanahue from Minnesota
    • As to shrinkage, I have not noticed any with this item or any of the SmartWool base layers (men's and women's) I have purchased over the years. Cannot answer as to the bottoms keeping you warm during cold winter nights because it would depend on everything from actual room temperature (what's cold to you may be cool to another person) to what blankets/comforters you use. There are warmer base layers than this product.
      Answered on 10/22/2017 10:29:59 AM by lamcha from Michigan
    • I have worn these SmartWool base layers by themselves. If I am hiking and it gets too hot I have taken off my outer shirt and hiked in just the SmartWool base layer top. I am 5' 8" tall and weigh 158 lbs. and 34" waist and 37" chest I get a size medium bottom and a size medium top. They fit next to skin and I believe they are warmer than polyester base layers. I have never had any of these shrink however I wash them in cold water and use Nikwax Wool Wash and hang up to dry, I do not use a dryer for them. SmartWool makes a quality product, I like them very much.
      Answered on 10/22/2017 3:17:25 PM by hikerbiker1&2 from Ohio
    • Yes, they are very comfortable to wear, even after 15 hours. I have not noticed any shrinkage as you normally do with wool.
      Answered on 10/22/2017 3:33:57 PM by Tiny72 from North Dakota
    • The answer depends on room temperature, blankets, etc. On nights below freezing, I wear these as a base layer in my sleeping bag while camping out in a three season tent. They help maintain my body temperature and allow me to sleep comfortably. I am a 36 waist and the large fit me perfectly. I wash them according to the SmartWool instructions and air dry with no shrinkage.
      Answered on 10/24/2017 8:52:51 AM by Mark from Colorado

About SmartWool

Born in the Rocky Mountains of Colorado, the SmartWool clothing brand launched in 1994 as a small company with roots in the snowsport industry. Quickly becoming world-famous for SmartWool socks crafted of super-soft, breathable and odor-resistant merino wool, SmartWool has continued to evolve, now offering a wide range of fantastic apparel for active lifestyles, including SmartWool ski socks, base layers, underwear, sweaters and even jackets. Thanks to a commitment to using only the highest quality fibers and sporty, modern designs, SmartWool socks and clothing continue to exceed the demands of outdoor lovers everywhere.