For those riders who like the style of the Original KD's but are looking for a larger frame, the X-KD's are 20 percent larger. KD's are the #1 selling biker sunglass in the world! These are the sunglasses that Jax Teller and other Sons of Anarchy club members. The Sons of Anarchy TV show chose these sunglasses because nothing screams biker like KD's. This black framed sunglass has been extremely popular with bikers for over 60 years because they stay on your head and keep the wind out of your eyes by fitting tightly on the temples and nosebridge. And most importantly, KD sunglasses look great on men and women.