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For cold winter days and treks through alpine terrain, the Smartwool Men’s Lightweight Bottom is the intelligent way to start your layering system. Made from 100% jersey knit merino wool, this lightweight baselayer wicks moisture and dries quickly while fighting nasty odors during extended forays into the backcountry.

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Very comfortable

  • Familiarity:I've used it several times
  • Fit:True to size
  • Size Bought: Large

I really like these things. Very comfortable. I heard merino wool wasn't itchy but I was still leary, until I got these. I was also surprised by how warm they were for such a thin material. Close to skin but not too tight. I purchased a matching top and would give it the same review. Only negative is that hefty price tag but you can often find it on sale.

Smartwool to the Rescue

  • Familiarity:I've used it once or twice and have initial impressions
  • Fit:Runs small
  • Size Bought: Small

I'm headed to the cold cold north soon for the winter and everyone recommended Smartwool. Initially, the price tag made me a little cautious. I mean, 85 bucks for long johns is a pretty steep price. However, and after trying out many of Smartwool's competitors, I realized that they are on the top for a reason. Simply put, Smartwool is the best. Granted I've only used these a few times, but they are comfortable and warm without being stifling. They breathe and seems to have some wicking qualities without being sopping wet. The fit is overall on point, provided you size down significantly. I'm usually a large but had to go down to a small here. And it's not a tight fit either. Also, be aware that these are a baselayer, not a single layer. If you throw just this on, people will be able to see, um, your details if you're not careful. So, good luck and go with Smartwool.

Very nice, but check your size

  • Familiarity:I've used it several times

I went by the sizing chart and picked up a large. I should have gotten a medium. I'm 6', 175 lbs, 34" waist. Large fits good everywhere and then goes all sorts of baggy around my crotch. I have a fat Sicilian ass too. They are far superior than the Arc'teryx EON SLW Bottom (put a hole in them just putting them on).

Bought for hiking trip

  • Familiarity:I've used it once or twice and have initial impressions

I bought this for a planned hiking trip in New Zealand (Milford Trek) which spans 33 miles over 5 days. I have only tried this on, but I plan to use these with North Face Paramount Convertible Pants and also TNF Venture Side Zip Pants. These are quite thin; kind of like a pair of "silk" pants I have for skiing. Probably more to keep sweet and water from soaking in, not sure how warm these will be.

Very soft

  • Familiarity:I've put it through the wringer

I love these despite the fact that they do not look like the photo after about 5 minutes on my legs. Good thing I am not trying to make much of a fashion statement. Icebreaker seemed to have a tighter weave, but did not stretch the 36 inseam I needed for comfort. Smartwool also seems to have done a better job in figuring out how to take the little remaining itch of wool, so they get my pick despite the fact that they get holes much quicker and do not come in as many cute colours. I am tough on my cloths. 170# and long legged, a medium works great! I wish they had an expedition weight. LL Bean makes a nice TALL size that comes pretty darn close! But Smartwool is my pick for overall performance on the trial, curled up at night, and kicking about town in a skirt. Heck, why take them off to shower? I live in my Smartwool!!!

SmartWool NTS Lightweight Bottoms Rock!

  • Familiarity:I've put it through the wringer

These are my go to long johns for alpine backpack trips. I use them every night, around camp, and in my sleeping bag. Even if I don't need the extra warmth in my bag, the lightweight layer keeps my legs from sticking together after 6 days on the trail! My legs don't get cold when hiking so I don't have experience with these bottoms in a "heat build-up"situation. Recommended.



Note: When worn, my bottoms definitely don't look like those in pic. I've scoured my photo database and can't find a single pic of the real deal!

SmartWool NTS Lightweight Bottoms Rock!

Quality problem on two consecutive Smartwool bottoms

    I purchased two Smartwool merino liners, one from a local shop and another from Backcountry a few days later. The same day the one from Backcountry arrived, I washed the one from my local shop. Followed all instructions and washed on gentle cycle with low heat dryer. The pair came out unraveling at the ankle seams. Exchanged that at the local shop for a second pair which came out of their first washing with a huge rip in the seat (and it wasn't even on the seem). I thus decided to return the unused pair to Backcountry and go with Icebreaker instead. I live in the town of Smartwool's HQ and emailed in my issue but haven't heard anything back in a week. This is quite disappointing to see the "hometown team" have this problem. For now, I'd stay away from this product.

    Great gear!

      I ordered these and a crew, both lightweight. They are perfect for me in north Alabama. Following the size chart's recommendations got me a good fit.

      They are so comfortable that I have found myself not wanting to take them off. Amazingly comfortable, much different than the wool I grew up with.

      Plenty warmth for my part of the country. I'm hooked.

      Perfect light to mid weight base layer.

        I could not be happier with these. They are super soft. Unbelievably comfortable. The seams on other base layers I have worn have bothered me. I don't even notice they are there on these. Warmth wise, well they are a lightweight pair. Although, they are warmer than other lightweight layers I have tried. Perfect for snowboarding or other winter activities during a Utah winter, which is exactly what they are made for. However, not the best for high mountaineering unless you have some other significant layers on.

        Unanswered Question

        Hello, I will go to the K2 and I look...

        Hello,

        I will go to the K2 and I look for thermal untherwear for -40�C. What item would you recommend?

        what TEMPERATURES DO LIGHT WT VS MID WT...

        what TEMPERATURES DO LIGHT WT VS MID WT GENERALLY HELP THE WEARER WITH?

        THANK YOU

        JOE AT "ENTITLEMENTAUTHOR@YAHOO.COM

        Best Answer

        Smartwool does not give a temp. rating for there products. Here is how they break it down.

        NTS Micro 150g/m2- single layer for warm weather, base layer for cool weather

        NTS Light 195g/m2- single layer for cool or cold weather, base layer for cold weather

        NTS MID 250g/m2- single layer for cold weather, base layer for very cold weather.

        I used these in western Virginia recently on a 12mi day hike. The temps ranged from mid 20's at start to about 40 up on the sun side of the mountain. I was perfectly comfortable since I had no issue with being cold before starting and the light sweat in the afternoon was no bother at all. The NTS Light was the perfect choice for my hike that day.

        I used these in western Virginia recently on a 12mi day hike.  The temps ranged from mid 20's at start to about 40 up on the sun side of the mountain.  I was perfectly comfortable since I had no issue with being cold before starting and the light sweat in the afternoon was no bother at all.  The NTS Light was the perfect choice for my hike that day.