Offered in luxe tweed, the Derek Lam 10 Crosby Fenella Skirt features a classic midi length and an inverted pleat for maximum movement and fullness. Offered in luxe tweed, the Derek Lam 10 Crosby Fenella Skirt features a classic midi length and an inverted pleat for maximum movement and fullness. 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.