CA Mode Women's Halter Backless Bridesmaid Formal Evening Prom Gown Maxi Dress This crinkly maxi dress is unlined and will be your favorite during the party. It features self-tie halter for adjustable fit and unlined trianlge cup with drawstring tie under bust. Ruffled trim all in the right places adds a feminine accent. Throw it on a bikini or wear it alone to your special event for an effortless look. The material is polyester which gives you comfortable feeling.