SmartWool Microweight Crew - Men's

Just bought this shirt a few weeks ago and already I can see I'm going to need at least one more. I hiked and backpacked in low 60 deg temps with this as my only layer and was completely comfortable. At night when the temp dropped to 40 I only added a fleece. For as thin as it is the warmth was amazing. The next day when it hit 75 I was still fine. I'm 5'7" 145 lbs and bought the small, turned out also to be perfect. Love the extra length on the sleeves too. You can't go wrong with this shirt!

I am all about efficiency with my backpacking gear, and these are part of that kit. These are my must-have layer for over my short-sleeve NTS Microweight when needed, and under my jacket or windshirt. I rarely pack pants along, so these are the top half of my full-length warmth piece, whether that means at camp at night or in the morning, asleep in my bivy, or on the move the next day. I love the warmth, the temperature regulation, and the insulative properties when damp or even wet. And it just doesn't get any softer than Smartwool, does it? ;-)

This is a great baselayer that I find myself reaching for more and more.I have tons of great baselayers from Icebreaker and Underarmour and TNF but this is what I wear most often when the temps dip below 30F.Comfortable, not too tight or loose and no funk after wearing one for five full days of snowshoeing in the Adirondacks.No smell?unheard of,until now.

I love this shirt. It keeps you warm but not too warm, blocks some wind, and doesn't itch. It really works. I wear them to work, on the trails as a first or second layer...anything. I would also definitely buy them at a discount if you can. Price aside, great shirt.

I accidentally picked this up on SaC when some overzealous clicking landed my inventory checking to a package on my doorstep. Backcountry's loss. The way I see it, if I had a warehouse full of these I would pile them up + never leave. The material is a soft, odor fighting, durable, powerhouse that acclimates + responds to your body's heat production.

The flat-locked seams are offset from the shoulders to make way for a pack + the athletic fit makes the M fit on my 5-11" 165 frame nicely.

This microweight top performs great for constant or stop and go activity in the mountains. When it gets damp from perspiration, it continues to insulate and feels nice against the skin, and then dries quickly. The fit is nice and trim, with plenty of length for tucking and staying in place. You can even throw 'em in the dryer at wash time. Highly recommended!

Perfect for when it's cold but I'm just sitting around (don't need the zip-neck for venting). More than comfortable enough to wear against the skin and under most all long sleeve clothing (sweatshirts, sweaters, other long sleeve tshirts). Merino is definitely better with odor too if you use this as a baselayer for longer pushes.

I like this smartwool shirt well enough,but would've been happier if it were a bit roomier.I am a big guy-6'5",260lbs.and if I wear this(xxl)out in public,people think I'm showing off the build.I'd much rather a looser fit to be comfortable and to blend in better.
That said,it's very good at wicking moisture away from your skin,does not hold any foul smell,and bounces back from washings.

I love the smartwool Long sleeve crew shirts. I own a few of the midweights that are perfect base layers for cold weather outdoor fun. I bought the microweight for those milder temperature days, and am very satisfied. It is lightweight and comfortable. I would highly recommend it.

Safe to say this is the best shirt I've ever wore. It really does it all - keeps me cool on summer canoe trips and a warm base layer in the winter. When I first tried it on, I thought there was no way this could handle a single weekend in the Boundary Waters. Boy, was I wrong!

I've taken it through the thickest of N. Minnesota woods (even thorn thickets) and have only one small hole the size of a small pea to say for it. I didn't notice it until someone pointed it out to me. Regardless, I'm extremely impressed considering how thin this is.

I'm also enjoy how the shirt takes a few days of wear to actually absorb any stench coming from my body. I have under armor clothing articles that smell nasty after just one use!

I'm 6' 180 lbs and strap on the medium. The fit is dead on...not too tight and not too loose.

This is a great base layer, new best favorite. It is suprisely warm. Will buy another.

One of the greatest baselayers in my pack.
Whenever I go out in the woods and it's colder than 40,this will go with me.Warmth without weight and it's breathability has no peer.I am not easy on any of my gear(but I take exellent care of everything-maintaining all I own with the knowledge that it may one day save my life)and I have not been easy on this,but it has stood up to numerous scrapings and washings and never looks the worse for wear.

I love this shirt, very comfortable, breathable and warm. I recently found a couple holes and its only been through the wash 4 times. It probably my problem, not the shirt's. Like I said I love the shirt and stitched it up with some same color thread. I'm a 44inch chest and 180 lbs and bought the XL. It fits good, just a little loose for those that like it tight. Some guys my size may want to keep it tight to use for layering (go large), I wear it on its own or layered under a zippered jacket or micro fleece.

if one ask me, if you had to bring with you just one top garment for a week trip in temperate environment, it would be this one in black or grey. I love it, light, warm enough to let you feeling good/OK at a wide range of temperatures (40 to 70), odor free... You can wear it as a piece of underwear, or as a light LS tee, alone, or under a jacket. The only downside is the fabric, so light that it's really fragile. Try to handwash it as much as possible and you'll enjoy it for a long time

Nice feel, handles moisture well, and breathes. I wear over a t shirt but under a jersey from 50s to colder. Below 50 I add a Jacket over the jersey. Not bulky, layers very well.

Size is true, not bicycling sized. Buy the same size as your t-shirt.

Con: is price very expensive for a mid-layer

Smartwool was my first none synthetic baselaye and I loved it from the first time I put it on. It was extremely warm, breathable, and comfortable. I wore it tons. However, after some use, the bottom of it pills...not a little...ALOT. I washed and hung dry it, and the pilling still happened. I asked our Smartwool rep and he said it was because it was rubbing on my pants and it was causing the pilling. Bottom line, to stop the pilling, tuck it in.