The Peltor HY51 Hygiene Kit is an essential maintenance component for 3M Peltor Optime I (H510 series) hearing protectors. This kit includes two replacement foam inserts and two sealing rings, designed to restore the original hygiene and acoustic performance of your earmuffs. Regular replacement, typically every six months or as needed, ensures optimal comfort, protection, and extends the lifespan of the hearing protector. Made from durable PVC and foam materials, this kit helps maintain consistent attenuation levels and user hygiene.