The Robertson flared twill trousers by Derek Lam 10 Crosby feature gold-tone sailor buttons and a flat front, all crafted in wrinkle-resistant Crosby Twill stretch cotton for exceptional comfort. The Robertson flared twill trousers by Derek Lam 10 Crosby feature gold-tone sailor buttons and a flat front, all crafted in wrinkle-resistant Crosby Twill stretch cotton for exceptional comfort. 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.