To wear this Roma Dress, just slip it on over your head. It's a great piece for casual outings or a day at the park. As for the faint yellow mark on the inside top back seam, don't worry about it showing. Just make sure to wash it gently with mild detergent on a delicate cycle. Hang it to dry to keep its shape. And since it's a one - off sample and can't be returned, take extra care of it so you can enjoy wearing it for a long time.