I cannot wait to buy more pairs of these in other colors! These are high good quality base layer or long underwear pants, warmer than the knitted silk ones (which are also great but not very durable). I just bought these so cannot attest yet to durability but have previously owned this type of merino/silk under-layer, though this is my first exposure to this brand. I am very impressed by the fit, which is exactly as expected and long enough if you are tall, as well as the softness and the warmth. They are a fairly lightweight base layer and thin enough to wear under clothing, with a non-bunching, close but not tight fit and an excellent, well-sewn, non-rolling waistband. These are everything you could ask for from a base layer, practical but luxurious in feel. I will certainly buy them again if they remain available on Amazon-they are well worth paying the shipping fee, which I am usually cheap about on Amazon, where it seems like shipping should be free-in every color I can save my pennies for. They are not cheap but it is IMO a better investment than the silk knit ones, which I do still like but they usually cost about the same as I paid here and they just don't last very long. BTW, two points people might want to know about: 1) The merino gives absolutely zero itch or scratchiness, just soft and warm and rather cuddly, and 2) These are men's but can be unisex; there is no fly in case that is important to you (either way is fine with me and the flat front reduces bulk or bunching). I hate to recommend these so highly since I worry that none will be left over for me to buy but I must! Buy with confidence.