These are the highest quality shades to hit the market. Not to mention the style they bring. They are hand crafted in the U.S.A. and are made from cordura material. The fly shade is made from a neoprene material with elastic hooks on the inside to keep it attached to your fly hat while hanging under the helicopter.. The hard hat shade comes equipped with a front pocket for the brim of your hard hat, along with 4 locations of velcro for added support.. FLY SHADES DO NOT WORK WITH FULL BRIM HARD HATS. THEY ARE DESIGNED FOR PETZL, BLACK DIAMOND, ETC. STYLE HELMETS. Both styles of shades measure 18in L x 17in W