This is a much better fabric than other high end materials such as LuluLemon (which I wore for years). Great wicking, and can easily double for gym or casual wear. Thick enough to wick sweat, yet light enough to breathe - an enigma like wool socks. I recommend sizing up in this line. It’s definitely built for athletes, not a Gap model. I normally wear XL, but XXL is great in this line. Will order other colors, very satisfied.