KastKing Skidaway Polarized Sport Sunglasses, UV Protection 。?Grilamid® frame ?Tri Acetate Cellulose lens ?Polarized ?Scratch Resistant Coating coating ?Lens width: 2.3 inches ?KEY FEATURES - Polarized lenses reduce glare - Impact resistant TAC lenses protect your eyes from flying objects - Block 100% of the harmful UVA and UVB rays - Lightweight, durable, and comfortable Grilamid frames ?OUTSTANDING LENSES – 1.0mm polarized lenses are comparable to the thickness you would find on much higher priced sports eyewear. TAC (Triacetate) lenses pass a double decentering test to ensure there is no optical distortion which can cause eye strain and headaches. Polarized reading sunglasses help reduce glare caused by reflected light to improve vision and comfort. ?SUPERIOR FRAMES – Made from the same Grilamid material commonly used by the military and in medical applications, our frames are lightweight, extremely flexible, and heat and UV resistant. Grilamid frames are well known for their strength, lightweight comfort, shape integrity, and impact resistance. This ultra-lightweight and malleable material translates to a very comfortable fit. ?BASE LENS COLOR and UV PROTECTION – Smoke lenses are ideal for bright sunlight with the most realistic color reproduction and also work well in medium light and partial shade. Brown lenses increase contrast and depth perception, ideal for partly cloudy to sunny conditions.