Barton Perreira's Coltrane sunglasses are constructed of black acetate. Oversized square shape. Keyhole bridge. Clear nose guards. Core wire visible at temples. Noclurnal (grey) polarized lenses. 54mm eye size. 21mm bridge size. 148mm temple size. Available in Black. Acetate. Made in Japan. Includes hard protective case and microfiber pouch. Barton Perreira Men's Coltrane Sunglasses - Black A great designer gift. Shop Barton Perreira at Barneys New York.