NBD x Naven Iris Crop Top in Blue. - size L (also in XL) NBD x Naven Iris Crop Top in Blue. - size L (also in XL) 98% cotton 2% spandex. Hand wash cold. Adjustable shoulder straps. Exposed back zipper closure with O-ring accent. Imported. NBDR-WS358. NVS34 U19. For the girl who's the life of the party. For the girl who's always up for a glass of champagne. For the girl who likes to keep her closet as filled with as her social calendar, there's NBD. The young-at-heart line features dresses that every it girl covets and pieces that are sexy, flirty, fun and now.