NBD x Naven Twins Chromat Crossover Top in Black. - size M (also in ) NBD x Naven Twins Chromat Crossover Top in Black. - size M (also in ) Poly blend. Criss cross straps. Exposed center back zipper closure. NBDR-WS6. NBD14F023. For the girl whos the life of the party. For the girl whos always up for a glass of champagne. For the girl who likes to keep her closet as filled with as her social calendar, theres NBD. The young-at-heart line features dresses that every it girl covets and pieces that are sexy, flirty, fun and now.