What a unique style that is truly innovative as these knit shirts are two in one.  Knit in a tubular fashion, you can flip the shirt inside out to either have a t-shirt shape on the outside or a vest/tank on the outside, with the other side showing for a layered look.  This may be something easier to see in person how it works than to describe, but getting dressed will never be a bore!  Made from a soft cellulose silk blend knit, you won't want to wear anything else, plus, the deep green shade is just perfect.