KD'S - 2011 Day2Nite Lenses That ChangeKD Day2Nite 2011 Grey Photochromatic Black Frame Note to our new KD customers: KD's are a small sunglass that's the cool look, that's the fit. If you would like your KD's to have a little larger fit and look, check out our X KD's. These lenses are dark outdoors in the daylight and lighten automatically to almost clear when worn indoors or at night Lightweight 100% UV protection Anti Fog 100% Shatterproof polycarbonate lens Total Frame Height 1 1 2"