This series of Clip-Ons are designed to fit onto any hard hat or bump cap brim, and are worn in conjunction with your existing protective eyewear. They are quickly flipped down to enhance your vision, and then flipped back up when not needed. This series features a gooseneck mechanism for easy raising and lowering of the lenses, and the resistant polycarbonate frame can withstand high temperatures. They are available with Green IR shades 4,5,6, 8 and Colbalt Blue shade 4,5,6 & 8. Please note: The hard hat in the image is NOT included with the clip-ons.