The CVA Bushwacker Optic Cover is designed to fit both ends of your scope (ocular and objective). CVA has sizes to fit the majority of scopes, as well as a variety of binoculars, flashlights, smaller spotting scopes and other field optics. The stretchable covers fit securely and are easy to use. The CVA Bushwacker Optic Cover has a snap-lock lid preventing dust build up and moisture (rain and snow) accumulation. It is ideal for gathering light under low-light conditions, or for quick, close shooting situations.