that it is not for extreme cold situations. This product did not state for winter / fall which didn't occur to me until I found a replacement that did so I will not take that out on the rating. The material itself is moisture wicking, thin, soft, nice feel - not fleece like. I work in a freezer for a good portion of my shift every day and though it does help, its just not enough for that type of environment. I really believe it would be a help in mild winter though. I am still going to keep it as I believe it will be most useful for summer and fall. Even giving it a soak for summer time use. Nice fit and seams line up right.