How do you make Electric's Knoxville Sunglasses even better? Make them with polarized lenses, that's how. These glasses offer the same classic style and high quality offered as the standard Knoxville's. These bad boys are a size category 3 sunglasses. They're made using a 6 base mold injected Grilamid frame, 6 base Polycarbonate Lens, and 5 barrel stainless steel optical hinge. Each pair offers 100% UV Protection. Made in Italy.