Alice and Olivia Black and White size large top

This is a beautiful blouse lined perfect condition I have never worn it it's a size large and it did not fit me the sleeves are split to show your arm it has double layers and the back is also split down the back with a little button waist draped classic gorgeous clothes by Alice and Olivia there is no tag on it telling me whether is polyester or silk I feel like the lining definitely feels like Silk and the whole thing really feels good so I'm not sure if it is silk or not