The Butler Creek Flip-Open Eyepiece Scope Cover offers reliable protection for your scope designed with hunters and shooters in mind. Crafted from durable polymer this black slip-on cover fits eyepieces with a 33mm diameter ensuring a secure and snug fit. Its innovative design creates a watertight and airtight seal safeguarding your optics from the elements. With a simple touch of the thumb the cover flips open quietly thanks to its silent hinge and ergonomic button with a nonslip surface. Weighing less than an ounce it remains lightweight and functional even in cold temperatures down to 40 degrees Fahrenheit ensuring you stay focused on your target without any distractions.