All you glass blowers have been asking us for years to develop a lens that you could use for sodium flare filtration and here it is. We collab'd with the sick crew of glass workers over at Heady Didy to develop this frame and lens combination with a variety of lenses and frame colors to suit your style..  The frames feature High quality Poly carbonate lenses in 2 different shades with a mirrored option on the darker lens to further reflect UV and IR while allowing you to see all the different colored glass.  Comes with a Black Flys zip case and micro fiber soft bag