This dress is super flattering. It does have a zipper closure in back that goes up half way. It also ties on the top back for extra support. The buttons in the front are fully functional so you are able to undo them if you would like. The dress is double lined so you do not have to worry about being see thru.
Material: 100% Rayon
I am 5'6 and wearing a size small. I would stick to your true to size.