I have Butler creek lens covers on mine. Cant remember which ones I used, Ill look at them when I can dig my way to the garage.
For the front lens, I THINK I have the lens cover that came with my sightron binoculars. They fit well on the front lens. I cut mine in half, and rigged it so that each cover is connected to the binocular strap, right next to the eye pieces on the binocular.. They stay on the lens until needed, then I just pop them off when I want to use them