I'll start by saying that these are very warm and do a great job for a lightweight base layer. The problem is the short cut legs. Once you start walking and, especially climbing, the cuff ends up around your knee. Not only is it uncomfortable, but it also makes the lower half of your leg much colder than it should be after you stop moving. The only way I've found to mitigate this is to tuck them into very high, tight wool socks. I would have been happier if I'd have purchased the full length version.

Nice compromise on weight, and these seem to stay over my knees better than the lighter weight ones. So many long johns are too tight around my lower legs so no problem here.

I do a lot of walking hunting public land and needed a light base layer to retain some heat but not so much I would sweat. These were exactly what I was looking for! The midweight 250 merino gives me enough warmth to keep my muscles loose but not enough to make me sweat a lot. The boot top is perfect for allowing a little extra ventilation around the top of my socks keeping my feet from sweating as much and the cut makes it a lot easier to change socks at the base of the stand. The only issue I have with them is I am 5'10"" and 140lbs, needless to say, my legs are skinny and the bottom of the Kiln Boot Top isn't tight enough around my calf to keep them from riding up my leg some when walking out to my hunting location. It is more of a personal problem so I would highly recommend these.

I take most reviews with a grain of salt, especially for a high quality brand like FL. But I truly regret this purchase. I bought these for late archery. They might work better with TALL socks that can hold them down, but they come to about midway down my calves and are constantly coming up to just below my knees. Strange having only half my legs warm. Wish they made a lighter weight full length like my furnace long Johns.

I think FL is on the right track with these, But.. I find that there's not enough room in the groin, its needs higher waist, the calves and waist are a little loose in proportion to the thighs.