SPORT MEN。The 90s Y2K wrap glasses never go out of style. These are ultra cool vintage Luxottica, \"Challenger\" line impact extreme sports Sunglasses in silver frames with purple lenses. In the late 90s, Luxottica, a renown Italian manufacturer produced a luxury dedicated Challenger sub-line that used specific design elements which made these endure decades and still look great. They were made of flexible nylon and thick polycarbonate lenses designed to withstand sports related impact, have superior hinge durability and frame tension compared to alternatives. The black rubber ear pads and temple padding prevent slipping. Not only are these perfect for sports, riding and other activities, but they look great for daily wear!! Details: Manufacturer: Luxottica (Challenger Line) Model Codes: The numbers 6/748.376 and 91313 are specific to the production run and color; and confirm authenticity. Frames Made from Grilamid or High-Grade Nylon: which is extremely flexible and resistant to UV damage, explaining why they have remained in good condition. Impact Resistant Lenses. Hydrophilic Rubber Pads: The black sections on the ear pieces are made of high-grip rubber designed to prevent slipping during athletic activity. In very good pre-owned condition as shown. Please note: vintage and preowned items may have been many places and exposed to pets, dust, smoke, air fresheners or any other scents or allergens and are as is.