Size 18 Prom dress, wedding dress, ball gown Flowing A-line silhouette Deep v-neckline Built-in bra cups and vertical boning for support Thick shoulder straps Back zipper Full-length double lining for extra coverage *This dress does not have a slit Tulle is a lightweight, hexagonally woven fabric made of 100% polyester fibers. This soft Tulle is always double-lined with a proper dyed-to-match lining, so your colors are always unison to one another. Tulle does not carry an elastane meaning there is no stretch, but not to worry as this fabric is used to create our soft, delicate, and flowy silhouettes.