The NYX Carbon Series design is carefully crafted utilizing 6-base len curvature, which closely matches the natural curvature of the eye. This is important factor eliminates nearly all distortion properties across the normal viewing range, and makes this system the best all-around package for shooters, golfers, medical and fisherman.The frame is made from Grilamid TR-90. This nylon 12 derivative is the best combination of strength and flexibility available in a lightweight frame. The material used for both the nose-piece and ear pieces is designed to keep the glasses from slipping, even in sweaty conditions.The polycarbonate lens meets or exceed ANSI Z80.1 requirements for impact resistance. They are coated with a scratch resistant material and block 100% of harmful UVA/UVB light.Packages Include1 Frame (Color of your choice)3 Polycarbonate Lenses (Different colors based on selected package)3 Nose Pieces1 Soft Micro-Fiber Poly Bag Carrying Case1 Foam Lined 5-Slot Carrying Case