Designed and assembled in Sweden By Leech. Mosquitoes are the greatest problem during dawn and dusk when the lighting conditions are a little weaker. (Note that the glasses are not removable from the net.) Lens Coating you get with this model: Scratch-Resistant Coating Through all the advancements in eyeglass lens coatings, eyeglass lenses are still not scratch proof, not even glass lenses. However, Leech eyeglass lenses are treated front and back with a clear, hard coating which make it much more scratch resistant. Ultraviolet Treatment UV400 Keeps the sun’s Ultra Violet rays from damaging your eyes. 100 % UVA, UVB and UVC Protection