Oakley's HDPolarized lenses and Iridium lens coating give the Silver F Sunglasses the glare-free viewing precision that you've been dreaming of. But that's just part of what makes these killer shades so cool. The Silver F Sunglasses feature folding stems with piston spring loaded hinges for an ultimate sleek profile and durability while folded, making them ideal for travel or wearing before and after your ski or surf sessions. The ultra-lightweight and durable NanOmatter frame material complements the modern design, and Oakley's legendary Plutonite lens material offers clear visibility and UV protection. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.