Calvin Klein Royal Blue Formal Dress

Calvin Klein royal blue strapless dress. Used condition. Worn 2-3x and freshly dry cleaned. Tulle hidden underneath lower part of skirt. When photographing I noticed discoloration on the sash. Please see photos for examples. I do think you could wear this without the sash though. Hidden zipper at back. I recalled this being difficult to zip up, but I confirmed the zipper works prior to posting.