Peltor 3M Gel Sealing Ring Hygiene Kit for SportTacPeltor 3M Gel Sealing Ring Hygiene Kit for SportTac Peltor Gel Sealing Ring Hygiene Kit for SportTac are available to upgrade your standard foam as found on all the SportTac models if preferred. Gel ear cushions can be used on a wide variety of 3M Peltor headsets for supreme comfort. The gel rings have a super thin polyurethane skin with a double hump top face design and a silicone gel filled bladder with an incredibly soft comfortable Confor foam