Kit contains replacement sealing rings and muffler pads which can be replaced in a few easy steps Extends the life of earmuffs Ensures good function and hygiene Avoid wearing uncomfortable earmuffs Pack contains 2 x foam inserts and 2 x sealing rings 3M™ PELTOR™ Hygiene Kit for Earmuffs are our quick and easy solution to maintain your 3M™ PELTOR™ Earmuffs with replacement cushions and liners. Extend the working life of your hearing protection with 3M™ PELTOR™ Hygiene Kits. 3M recommends replacing our earmuff cushions and foam inserts every 6 months or sooner if they are damaged. 3M™ PELTOR™ Hygiene Kits include replacement ear cushions and foam liners for that specific ear muff. Quick and simple to use, you can replace your cushions to maintain the comfort you deserve and the head seal you need for proper attenuation.