The Original KD's Brings you a 20% larger version of their most popular sunglasses, a little larger to fit better for those people that need a little more. "Don't you have some that are just a little bigger? I need sunglasses for a big head!" That is what we hear from our faithful KD's customers with larger than average heads. So, we created X-KD's. They are the same great biker sunglass, just 20% bigger. Although some bikers still prefer the snug fit of the Original KD's, others say they want the extra room and coverage that X-KD's offer. They are both serious riding sunglasses that scream biker cool, so which ever you decide, you can't miss!