Shure EA406A Soft Flex Replacement Sleeves (Gray) for Shure E3c, E3g, E4c, E4g, E5c, I3, I4c, E3c-n and E4c-n models - Assorted Pack Replacement sleeves for Shure E3c, E3g, E4c, E4g, E5c, I3, I4c, E3c-n and E4c-n models Variety pack includes one pair each small, medium and large sizes Replacing your foams often will maximize your listening experience