Here at Enclave, we strive to be a little different. We use only the highest quality materials with all of our sunglasses containing 100% Polarized TAC Lenses, Stainless Steel Arms, Metal 5-Barrel Hinges, and Polycarbonate Front and Ear Tips. Since being funded on kickstarter nearly 8 years ago, this California based company has embodied this laid back but sophisticated mission. We believe this type of quality shouldn't cost hundreds of dollars, and we can't wait for you to get your hands on a pair of Enclave sunglasses and see what all the hype is about. It's all in the details Polarized TAC Lenses Our Polarized TAC lenses block out 100% UV-A/B rays. Stainless Steel The Model 20 Arms feature brushed stainless steel which is extremely durable and stylish as well as stainless steel 5 barrel hinges. Protective Sleeve Included The Model 20s include a heather grey protective sleeve and microfiber cleaning cloth to ensure your new sunglasses stay in pristine condition. Polycarbonate Front and Ear Tips A form fitted frame make for a high quality pair of glasses that you can comfortably wear all day. Technical Specifications Lens Size 52mm Bridge Length 18mm Arm Length 140mm Arm Material Brushed Stainless Steel Lens Polarized TAC (block out 100% UV-A/B rays) Lens Color Matte Black, Tortoise/Green, Matte Gray/Blue Hinge 5-Barrel Stainless Steel Front and Ear Tips Tortoise Polycarbonate