Large performance eyecup seals out ambient light Hypoallergenic silicon rubber comfortable eyecup Specifically designed to replace OEM Nikon eyepieces Easily upgrade your camera eyepiece in just a few seconds. Eyecup rotates to accommodate right or left eyed shooters. HoodEYE eyecups link your eye to the camera by comfortably sealing out ambient light. Eyecups are made of hypoallergenic silicon rubber for comfort. Hoodman eye cups relieve eye fatigue during long outdoor shooting. Specifically designed to replace OEM Nikon eye pieces. You can easily upgrade your camera eyepiece in just a few seconds. Patented locking tab keeps the HoodEYE securely mounted on your camera. Hoodman has been the pioneer and market leader in performance camera viewfinder eyecups for 10 years straight.