Swarovski's objective lens covers and eyepiece covers offer adjustable features to accommodate various eye distances while providing reliable protection against dirt and rain. Crafted with Swarovski's meticulous attention to detail, these special eyecups are constructed from fully-tested, non-allergenic materials, ensuring comfort and durability for users of Swarovski binoculars. Designed to prevent the intrusion of irritating ambient light, these eyecups contribute to an immersive viewing experience, allowing you to focus on the beauty of nature without distractions.