I took an E-Flex /Event visor and cut it down to fit the i4. Had to cut the tabs that lock into the upper vents down a lil bit to clear the lip at the top of the i4 mask. Sides I trimmed to fit the lines of the mask. It fits tight stays in place breaths well so no fogging issues. I can remove and install it as needed with ease. Keeps rain out and works well for blocking the sun when creeping threw the woods.