Your new beach resort outfit. found. This backless halter sweater mini beach vacation dress is at once breezy and sexy. Designed with a halter tie at with frill trim. an open back. stretchy knit fabric. and a short dress cut. this cool space-dyed knit dress for women is a nice summery-ready piece that goes from beach to bar with ease. Team it with your matching bikini set to complete a youthful journey.