HoodEYE eyecups link by 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 Z6 and Z7 eye pieces. You can easily upgrade your camera eyepiece in just a few seconds. Hoodman has been the pioneer and market leader in performance camera viewfinder eyecups for 10 years straight.