Amazingly cool knit blue knit Phil Rose of CA vintage mod shirt. I listed it at S/M because I'm a S but it can also be worn by a M. It's a little on the short side (21") and the neck opening is 10" wide. It has a zipper in the back and is one of the coolest shirt's I've owned. I always get a ton of compliments when I wear it and it's definitely one of a kind. Incredible condition!