Thick and shimmery rayon satin is more like silk satin than a polyester satin.  It breathes, for one.  It also has a rich deep shimmer, and a slight crinkle, making it look expensive and vibrant with color.  Use on it's own as a cute and sexy crop top.  Put under a bodice for a short sleeve peasant blouse.  Wear with summer skirts or jeans and toss into an overnight bag for a weekend cruise.....on a pirate ship!  the S/M  and L will stay up on the shoulders.  The XL and XXL will easily pull down for wenchy off-shoulder looks.