EyeShields by Field Optics Research are universal binocular accessories that dramatically improve the performance of even the finest optics. EyeShields block out all ambient light, so when you look through your binoculars, it's like turning out the lights and watching a movie! Even though Eyeshields are a relatively simple idea, the results of their use, combined with your optics, is dramatic. Eyeshields are crafted in a Patented, universal design that easily attaches to all binoculars, most spotting scopes, range finders, telescopes and even microscopes which makes them the perfect accessory for all your viewing opportunities. They're made from durable, soft and flexible rubber and comfortably fit to the side of the face, blocking out light and distractions for enhanced viewing. EyeShields also eliminate distractions such as wind, dust, rain, snow and other weather elements. When not in use, simply flip the EyeShields down into a convenient, out-of-the-way position.