Simply the ultimate scope lens protection for hunters and shooters. They custom fit to your scope, create a watertight, airtight seal, and open with a touch of your thumb, so you can put your shot through a narrow window of opportunity in the most extreme conditions.

Features:

• Fast, flip-open design keeps your eye on the target.
• Silent spring hinges won't spook game.
• Water-tight, custom fit friction mounts anchor them to your scope.
• Air-tight semi-O-ring keeps out dust and moisture.
• Tested to -40deg F.
• Truly ambidextrous.
• Weighs less than an ounce.
• Size 39.9mm