Details Our answer to the classic tuxedo, Losanna is the perfect black-tie gown. The back of the dress deserves just as much adoration as the front, with a sophisticated but alluring low back and elegant cross over straps. Slip into our Mavi sandals for the finishing touch. Concealed zip fastening at back Floor length Lined at bust Sleeveless Low open back Signature bias cut Empire waist: signature underbust seam