AVAILABLE ON LINE ONLY. The floating styles are equipped with Polaroid Polarizing lens, technical name is S13. The support layers of this material is CAB (Cellulose Acetate Butyrate). It is a 7 layer laminate with a high quality scratch resistant hardcoating. The whole lens is presspolished and optically correct, optical class 1, CE standard. CAB has advantages and disadvantages... +unbreakable +99% polarizing efficiency +100% chipping free +optically class 1, power readings and refraction is excellent -fairly scratch resistant 2.5 HD +lightest weight +very good thermal stability -distortion along frame edges possible • Floating • 100% glare-free polarized lenses by Polaroid • Dry wipe pouch • Rubber tip arms for additional comfort and hold • Rubber nose pads for impact resistance and non slip comfort • Slimmed down kid’s specific fit