• GLASS LENSES: These polarized sunglasses use Corning glass lenses, which provide better clarity than plastic lenses and are resistant to scratches. The multi-layer reflection nano coating not only reduces glare, but also makes them easy to clean. You'll enjoy crystal-clear vision with these high-quality lenses. • BEST FOR BRIGHT LIGHT: These polarized sunglasses for men are 100% polarized for protection from glare and UV rays, making them perfect for outdoor activities such as cycling or sports. The lenses absorb 85% of visible light and block most blue light, eliminating eye strain and making your vision clearer and more comfortable. • Unvarnished nylon frames: BNUS uses plant pigments to color its traditional nylon frames, which are cured at high temperatures during the molding process. This means there are no harmful substances or chemical residues, making them better for you and the environment. The frames are also more resistant to oxidation and can withstand pet bites and accidental eating. • SPRING HINGES: The spring hinges in these sunglasses provide a greater extension of the temple outward, forming a flexible temple-hinge system. This system offers more comfort and resistance than classical hinges, allowing the flexible temples to open to the size of your head and withstand bending and hitting.