The ideal baselayer for any cool weather activity, the Arcteryx Rho LTW Bottom for Men is constructed with soft, itchless, stretch knit merino wool, insulating even when completely saturated, regulates temperature far better than a synthetic baselayer, and resists odor, even on a week long backcountry trip.
Very Comfortable
I uses these when I train outside on cold days. Like the above reviewer said, they are just a little long, though I have that problem with most pants, (I'm 5' 9" wearing the mediums) so I don't consider it to be a problem, they're tights so it's not like they drag on the floor or anything. All in all I'm very happy with this purchase, I bought an additional 2 pair, that's how much I like 'em!
Great running tight-a little long in the leg
I have to have wool, merino wool, to be at one with the world. That being said, these tights keep me warm and the wind off. As with other reviews, the lengthn is about 2"-3" too long. I'm 5'11" tall, 235 lbs. I have to roll the bottom of the tights up about 3" to make them work. All in all, I would not change the construction. I use the leg pocket to keep an ID tag for emergencies. I have tested them as low as 15 degrees and they feel great. I plan on wearing them alone for winter jogging and cross country skiing. Since they were on sale, I couldn't justify not buying them.