I don't really know what a 'D shirt' is or how this one is classic, but I'm loving it either way. I need a new shirt or two and a light blue one is definitely on the list. The two-tone contrasts on cuff and collar are solid and work well with the white buttons. I like the look of a 3/4 button down, even though it's not a real one. I haven't had a chance to try it on yet but I like the fact that it's a looser fit so you can wear it as an over-shirt if you want or probably size down for more of a slim fit. Acne nailed the styling for it on their site too, (I think I might want some beige-y jeans now) the only problem would be it's inflated price tag.