Native Eyewear Nova Sunglasses With Sportflex Iron. Cycling glasses aren't just to keep the sun out of your eyes they are all about mellowing out all the glare and keeping your field of vision consistent and safe plus, cars and bikes throw projectiles off the road one smacks you in the eye and you could go down hard. A pair of Native Nova cycling sunglasses are about the most versatile eyewear you can get for cycling. They are great as shades, they are highly impact resistant, and are also ideal before sunrise, as the sun goes down, and on overcast days. Nonpolarized SportFlex lenses are designed to even out your vision in any light conditions, including low light, giving you a crisper look at the road or trail.