The Swarovski Flip-down Objective Lens Cover for Binoculars is a durable rubber flip-down objective cover for the EL series binoculars. Use this thoughtfully-engineered accessory to protect your Swarovski lenses from dirt, sand, and moisture. Replacing your lenscaps when you're not using the binoculars keeps dust and debris off the lenses and significantly increases the quality of your views. It stays just out of the way yet is easily located when you're done glassing. Fits: EL Swarovision 42mm & EL Range 42mm Binoculars.