Material: Polyester + Spandex. The rainbow dress is a slim fitting with strap ties. Problem item>>>>Contact the SELLER>>>>Repost or refund. Design: Plunging V Neckline, Two Front Slits and Adjustable Straps that you can make knot to fit you. The Back is Elastic and Pretty Stretchy. Occasions: Summer, Beach, Vacation, Holiday, Outdoor, Wedding, Cocktail, Prom, Dating, or Daily wear.