Modeled after Derek Lam 10 Crosby's cult-favorite flared trousers, the Gillie features a hidden waistband, hook and bar closure, and deceptively dressy look. Modeled after Derek Lam 10 Crosby's cult-favorite flared trousers, the Gillie features a hidden waistband, hook and bar closure, and deceptively dressy look. 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.