These are warm in the 40s with brisk winds and no sun. I'd try them for colder temps, but haven't found warm enough gloves to do so. The attention to detail is great. I've worn them on 40-70 mile rides with pretty much no chamois discomfort (that's a minor miracle!). I've tried the Nimbo chamois in the other Giordana lines, but it hits a hot spot. I'm 5'4", 120 lbs, bigger on the bottom than the top and wear a size S in these.