Costa Sunrise Silver Mirror Sunglasses

Low-light lenses perform best at dawn and dusk and during overcast conditions

The new lenses come in black or camouflage frames and in eight styles.Courtesy Costa

Designed for low-light situations, Costa's new Sunrise Silver Mirror lenses allow 30 percent light transmission versus the 10 to 12 percent of typical darker polarized lenses. Costa says that while Sunrise Silver Mirror permits more light to reach the eye, it maintains 99 percent polarization efficiency, which equates to the highest light transmission among polarized competitors on the market. Available in black or camouflage frames and in eight styles, the polycarbonate Sunrise Silver Mirror sunglasses cost $189 to $219.