The Airfoil yellow bifocal safety glasses +1.50 are the ultimate night biker glasses. Equipped with safety rated ANSI Z87.1 impact resistant polycarbonate lenses and thick, soft and sweat proof full high profile vented EVA Foam cushioned, the Airfoil can shield your eyes completely from wind, debris and the harmful UVs . Worn at night, yellow lens also known as night vision lens eliminates the glare around headlights of approaching cars. Yellow glasses are also great for cloudy days and raining days. Fits MEDIUM to LARGE heads. Free deluxe nylon water resistant zipper hard case and sunglass strap are included!