Amazon.com : KastKing Alanta Polarized Sport Sunglasses 。?KEY FEATURES - Polarized lenses reduce glare - Impact resistant TAC lenses protect your eyes from flying objects - Lightweight, durable, and comfortable Grilamid frames – Anti-slip nose and temple pads - Block 100% of the harmful UVA and UVB rays ?AntiOUTSTANDING LENSES – 1.0mm polarized lenses are comparable to the thickness you would find on much higher priced sports eyewear. KastKing TAC (Triacetate) lenses pass a double decentering test to ensure there is no optical distortion which can cause e-Slip Nose and Temple Pads – Co-injected rubber nose and temple pads help to provide both comfort and security. The soft, yet tacky rubber material helps prevent sunglasses from slipping off and also offers additional comfort to reduce fatigue. ?PREMIUM FRAMES – Made from the same Grilamid material commonly used in military and medical applications, KastKing sunglass frames are lightweight, extremely flexible, and heat and UV resistant. Grilamid frames are well known for their astounding strength, lightweight comfort, shape integrity, and impact resistance. This virtually indestructible ultra-lightweight and malleable material translates to a very comfortable fit and the tacky nose and temple pads prevent slipping.