NBD Let's Groove Pant in Black. - size XS (also in ) NBD Let's Groove Pant in Black. - size XS (also in ) Prepare to shimmy down the dance floor in NBD's Let's Groove Pant. The flattering high waist and slim fit are playfully dressed up with crystal embellishments and a ruffle hem that serve as the perfect dance partner.. 94% poly 6% elastane. Hand wash cold. Crystal accents. Flared hem. Hidden back zipper closure. 16 at the knee breaks to 32 at the leg opening. NBDR-WP29. NBP11 H17. 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.