This didn't look "simple" but it didn't look like I'd have a major problem; it's been years since used a invisible zipper, so I decided to do a placket and snap, but not before I had sewn and topstitched the facings. So now I have a malfunctioning snap and don't know what in the world I'm going to do with it. I would just trash-can it except it's very expensive and beautiful Chez Ami fabric! Anyway, if you plan to make this, think through your plan for the back closure before you start sewing! It is a beautiful outfit, truly!