Derek Lam 10 Crosby Plaid Ruffle Dress DetailsCacey Style. Black/white plaid. Spread collar; button front. Half sleeves with rolled cuffs. Black leather belt at dropped waist. Tiered ruffle detail on A-line skirt. Cotton/polyamide/wool/polyester. Imported. Please Note: Belt not included. Designer About Derek Lam 10 Crosby: Derek Lam made his debut at NY fashion week in 2002 with a collection of chic and exceptional clothes, created in the heritage of American sportswear. Since then, Derek has.