<p> Four twin sets of glasses: </p> <p> - a neutral grey one: provides determination of a real colour. Perfect for everyday use. </p> <p> - a brown one: increases contrast. Perfect for strong sunshine. </p> <p> - a transparent MLC-set: transparent lenses with a special multiple coating. Increases visual acuity while being used at night time. </p> <p> - a cadmium yellow set: yellow lenses with high contrast. Perfect for low light. </p> <p> </p> Due to the shockproof anti-scratch lenses made from polycarbonate your eyes will be protected from any kinds of flying objects and a soft foam pad on the frame won`t let any dust or insects get between glasses and your eyes. The polycarbonate lenses protect from dangerous UV radiation – they block up to 99% of it. Shockproof anti-scratch lenses from smoky obscured polycarbonate. A heavy foam coverage used for hermetic state of the glasses won`t let any dust or insects get inside, and its holes will provide ventilation and won`t let the lenses fog up. A scratchproof lens coating. The UV400 filter is maximum protection from UV radiation.