Incorporating versatile staples into your everyday, DEREK LAM 10 CROSBY adds a feminine flair to the Ruffle Sleeve Sweater. With a sleek fit, the slimming design plays the flirt with flared cuffs.. 47% wool 38% viscose 10% polyamide 5% cashmere. Dry clean only. Flared sleeves. Rib knit fabric. 10CR-WK48. JR81903RF. Named after the address of the Derek Lam International, LLC headquarters in downtown Manhattan, 10 Crosby Derek Lam is the first ever diffusion line from Derek Lam. 10 Crosby offers accessible styles that are always intelligent and always feature a surprising twist. And true to Derek Lam core principles, each piece upholds value and integrity of design, making every collection look and feel special.