The Butler Creek Flip-Open Scope Cover Size 11 is the ultimate scope lens protection for hunters and shooters, designed to deliver a fast, reliable shield against the elements while preserving your shot opportunities in extreme conditions. Custom-fit to your scope, this cover provides a watertight, airtight seal and opens with a touch of your thumb so you can stay focused on the target through the narrow window of opportunity. Its fast flip-open design keeps your eye on the target, while silent spring hinges prevent spooking game, and the water-tight friction mounts securely anchor the cover to your scope. An air-tight semi-O-ring keeps out dust and moisture, and the unit is tested to -40F for dependable performance in cold-weather hunts. Truly ambidextrous and weighing less than an ounce, this 11 Manufacture Size cover is built with black color from the Philippines to endure rugged field use, making Butler Creek a trusted scope accessory that protects your investment without slowing you down.