Theory Zalballa Rosina Strapless Crepe Top Size 6, size 8-10 UK Theory "Zalballa" top in Rosina crepe. Straight neckline. Sleeveless/strapless. Slim silhouette. Concealed back zip. Rounded hem. Acetate/viscose. Imported of Italian materials TheHidden back zipper, built in bra for support, fully lined, strapless, shell acetate/viscose, lining polyester, inside bra nylon/polyurethane, dry clean only, crimson red Rosina crepe, a strapless top to take you from day to night with a built in bustier for added support, fits true to size, invisible back zip hook closure, made of premium Italian crepe with a classic textured surface, slightly loose fit, sleeveless, hip length.