Shure PA755 Triple-Flange Sleeves for Shure Sound-Isolating Earphones (1 Pair) Reusable silicone triple-flange sleeves for Shure sound-isolating earphones Designed to ensure a personalized fit Sleeves form a tight seal while holding earphones in place Compatible with Shure E1c, E3c, and E5c earphones Includes 1 pair of replacement sleeves