#spitfirecut: optical grade collection featuring frames cut from Cellulose block Acetate and hand polished. Teflon Coated Screws and Double Barrel Hinges for durability and nylon, Anti-reflective Lenses with Ultra Violet protection. Strong, light weight, hypoallergenic frames made from a renewable resource. That means better for the environment. Ships with Custom hard Sunglass Case and microfiber pouch.