The Derek Lam 10 Crosby Sylvie Cardigan Sweater combines an open crochet knit with sparkling sequins, offering a chic and elegant layering piece. The Derek Lam 10 Crosby Sylvie Cardigan Sweater combines an open crochet knit with sparkling sequins, offering a chic and elegant layering piece. Named after the original NYC flagship store address, Derek Lam launched Derek Lam 10 Crosby in 2011 to elevate and transform everyday style through fit, form, fabric, color, and attitude.