SmartWool Lightweight Zip T-Shirt - Long-Sleeve - Men's

I am a huge fan of Merino baselayers - it's the only gear I wear underneath on the mountain. There is no itching, no stink and they are worth every penny. Personally I prefer Icebreaker gear - the thumb holes are so useful and if Smartwool would adopt them I would prefer them....

This is a fantastic buy, once you go Merino, you'll never go back to man-made.

The concept of the shirt is nice - zip front, collar, lightweight.

The implementation is poor. The collar fits poorly, the wool is scratchy (never had this from Smartwool before), and the weight is 9.5oz, not the stated 5.7oz (the 5.7 oz weight is even on the shirt tag). It's heavier and more bulky than other baselayers that are twice as warm - and that's ignoring the uncomfortable urge to scratch all of the time.

Not impressed.

I've been commuting by bike, and decided to add some wool base layers to my cycling wardrobe. I've not been cold since I started wearing wool on the colder mornings. In fact, my cycling jacket has taken a rest, and I've gone back to a vest. The wool simply keeps me warm, and since it breathes so much better, I don't get wet from sweating and I can ride with fewer layers. And the zipper on this style allows me to better control the temperature during harder workouts. I have both the lightweight and the midweight versions, and both are great, but I like the midweight a little better on the colder mornings (35 degF and below).

BTW, the fit is not loose and not tight. I might consider ordering a smaller size next time, as I like a snug fit.

Having worn a Burton first layer for about 10 years now I was a bit doubtful that this thin shirt could be as warm...
Wow, was I mistaken! This is so thin that it feels like a regular shirt but it is plenty warm!
I normally wear an XL for everything but an L fit me perfect. (I'm 189cm and thin with long arms)

Nice quality. I am 5'11" and weigh 157lbs with an athletic build and this shirt fits well. Material is soft and warm. I use it for fashion, non technical applications but I'm sure it would work well for technical pursuits.

Great top, perfect for a base layer or outer high aerobic activity. Seems to be holding up really well from those fine folk at Smartwool!

i live in Springfield, MO (the Ozarks) where the temp ranges from 50 F- 12 F in the course of a few hours, and 70 F- -5 F in 48 hours, lol. i haven't had it for long, but i'm already impressed. i've worn it all day long, during the day i just wear it by itself with a wife beater underneath, and at night when it's freezing or below, i just throw something windproof over it and i'm golden. i'm about 6'2" and a large fits me very well. it might be a LITTLE bit short in the torso, but sleeves are great, and it's nothing that would keep me from buying another one.

This shirt is perfect for those cooler days of hiking and biking. It fits close to skin and I bought a medium. I usually wear a large, but it fits perfect.

I had a XXL of an earlier Smartwool product (Versaweight) that fits well and is my favorite outdoor garment despite years of wear and several holes. But I returned this newer product; the quality is good, but they seem to have gone to a more formfitting (Tight) fit that is not for me. Some may like it but I don't. I tried a company called minus 33, and their XXl is loose, comfortable, and suits me better.

Love the smartwool but I'm 6'4" and have long arms. When are these shirt companies going to make a TALL size? I only got XL so the arms would be longer, I really am a L. Like the feel of the shirt but can tell I won't wear it for everything I want to wear it for because the sleeves aren't long enough.