Honeywell Impact Sport Bolt Replacement Ear Cup Cushions are an easily replaceable solution that's capable of enhancing the overall performance and life of earmuffs. Showcasing the height of comfort and hygienic properties, Honeywell Replacement Ear Cup Cushions are compatible with Honeywell Impact Sport and Impact Sport Bolt Earmuffs. It is generally recommended that owners replace their ear cup cushions every six months. This number may increase depending on general use.