For driving in the dark but just as well during the day. "COLOR: YELLOW LENS" The Natt glasses can also be worn over your regular glasses. These fantastic glasses have light, impact-resistant HD lenses that, when driving, greatly reduce glare from oncoming headlights while enhancing colors and clarity. Lenses reduce both glare and reduce eye strain, enhance contrast, which makes you see your surroundings much clearer. The glasses can be worn alone or easily fit over your regular glasses. Perfect all year round, day or night, with or without regular glasses underneath. - One size fits most - Modern, suitable for both women and men. - Lens size: approx: 6.5 cm x 4.5 cm (L*H) - Side lens yellow and matte. - Glass color: Yellow - Frame: Black These fantastic glasses have light, impact-resistant HD lenses that, when driving, greatly reduce glare from oncoming headlights while enhancing colors and clarity. Lenses reduce both glare and reduce eye strain, enhance contrast, which makes you see your surroundings much clearer. The glasses can be worn alone or easily fit over your regular glasses. Perfect all year round, day or night, with or without regular glasses underneath."