Not to gross you out or anything, but sharing personal items like headsets, while chummy, isn't terribly sanitary and can pass on bacteria and other nasty stuff. The next time you pick up that aviation headset after loaning them to a friend, only to find that the earmuffs are sticky (ew!), you'll really wish you had this 3M Peltor HY79 earmuff hygiene kit on hand. Here at SkyGeek.com, we're always looking after you, so we recommend replacing the ear seals and foam inserts on all Peltor Aviation and Helicopter, Alert, MT, HT, Tactical Pro, LiteCom and PowerCom headsets at least twice a year for what will feel like a brand new headset. You can trust the Peltor HY79 earmuff hygiene kit for the best hearing protection and comfort.