Fixer

6' 180 lbs w/ a 33"-34" waist. I went with the large. The waist is an inch/inch and a half too big. The rest of the pants fit great. If the waist was more true to size, I'd give it 5 stars because they're comfy, breathable, and hold up to the elements (from a blizzard in 20 degree weather to a downpour at 60 degrees).
I was out fishing with these on in a constant downpour for 4 hours and only had damp thighs and shins. Had I used some nikwax on them, I probably would've been completely dry.

I've had two pairs of these - just ordered two more - and can't say a bad thing about them. They're my go-to for any outdoor activity, from hunting, camping, fishing, and exercising, these things are the ticket.
They're light weight, dry wicked fast, provide cozy support, and breathe really well. There are times when I don't think I'm wearing anything at all because I don't feel them bunch up, pinch, pull, etc on anything down under.

I just got the navy colored one in a large in the mail last night. I put it on and found no reason to take it off because it fit so well and was so comfortable. I'm 6' 185lbs and find the fit perfect. It's not too tight and not too baggy, but just right.

I haven't tried it yet, but definitely think I could comfortably put on a medium base layer underneath. It'd fit like a glove! I also like that the cuffs each have a little slit to stick your thumb in so you can keep your hands warm. I wore it in to work today and feel like I'm not wearing anything at all - so light and regulates temperature so well. Oh and the hood fits perfect over my noggin. I have a narrow yet long head (size 7 5/8s for fitted baseball hats) and this thing covers it without any restriction but doesn't impair my peripheral vision.

One drawback is the care of the garment. I'm a big smartwool fan, but am a little irritated that this has to be handled with more care in the washer and hung to dry. No real biggie since it's wool, so I don't have to wash it as much and it'll dry faster than just about anything else.

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.