Oh, how do I start? I can only start by saying "I love this!"
The fabric is a dark emerald green stretch velvet. It shimmers and shines in the light and looks rich and elegant and it's as comfy as an old sweatshirt.
The pattern I used is Butterick 5215, which doesn't include the long sleeves but it really should because I've made it with long sleeves twice now but have yet to make a short sleeved version.