Definetely runs on the small side. They are short, tight and difficult to pull up comfortably. I have owned different base layer brands and this one, although nice quality (soft, warm, medium-thick),has a serious sizing problem. I'm 6'1, 230 solid. Bougjt and XL -what I wear in most clothes. These are very tight. Can't really compare it to a size because the "rise" (the seam from your waist to the bottom of the crotch) is very short.

The XL bottoms are way too short in length. I wear a 32" Inseam and they will not make it up over my butt. The XL relates only to waist and hip sizing IMOO. If you have a 30" or less inseam they would work. Perhaps a small framed person with a 32" inseam could hike them up high enough to cover up. 2" of material and I would buy 4 packs of these every year, such a shame.

Really Comfortable and Keeps You Warm

Great fit and warmth from these light weight base layer pants.

Excellent for cold weather athletic performance (sking, etc). Kept dry and comfortable even though I started to sweat.

Very comfortable and lightweight. Very effective protection against the cold. Not bulky and will not hinder movement.

Bought these last year and while they are good for a thin base layer, make sure you have safety pins - I wear them under my overalls and the waist falls down around my knees! The elastic in the waistband isn't much good.

Purchased for my husband. His waist is 38/40, inseam is 30. He has a bit of a belly. The XL fit perfectly. They aren't too tight or too loose. The waist is very comfortable. I will wash in cold water, hang to dry (to avoid static and over time wear to waist).

I don't know how cold it is for the zero ratings. I live in semi-cold weather here in Texas, and I am impressed that I didn't need a coat when it became 28 degrees. I had on three shirts and these free country under my jeans, and I didn't feel the chill at all, nor was I wearing a coat getting in and out of my vehicle whilst shopping. I almost forgot I had them on; they clung to me so well. I chose xxl . I approve of these because, although I'd prefer 100% cotton, these days it's half cotton and something else, so i decided to give these a try.

Great quality. Great price. Extremely warm. Laundries great. True to size.