grinderPUNCH® Classic style sunglasses feature blue blocking lens that are ideal for driving. The specialized lens increases sharpness and contrast by reducing blue light and relieving your eyes from glare and hazy vision. Spring hinges for comfort and polycarbonate UV protected lenses. The yellow tinted lenses are great for dusk-time driving, the yellow lens adds contrast and visual sharpness great for lower light conditions. Get them all and save!