Quality material. My only gripe was I needed it urgent;y and picked Size L top & bottom. I'm 5'11 with Size 39-40 chest. I think Size M is the best if you are my build. The Size L top fits like a t-shirt, but it is supposed to fit more tightly. Go for Size M, or a size lower than your regular size. P.S.: The neck is supposed to be low cut so that it can be worn under all types of shirts or tops.