OX-ON Eyewear Speed Plus Comfort Dark with dark lenses are the exclusive, safety-approved glasses for the person who needs to reduce incoming light connected to their work. The lenses are made of extremely impact-resistant and scratch-resistant polycarbonate, and the dark tinting reduces light levels, so the glasses are ideal for use in sunlight and as sunglasses in general. The lenses also provide 99.9% UV protection. The OX-ON glasses are fitted with anti-slip rubber on the flexible temple tips, and a non-slip nose bridge ensures extremely high comfort. The lenses have optical class 1 certification, meaning the glasses can be for permanent use.