The lifespan of Alpine earplugs depends on the frequency with which you use them. Regular cleaning helps prolong the lifespan. Based on a daily use (with for example the Alpine SleepSoft) we recommend replacing the earplugs after 3 or 4 months. Earplugs that are not used on a daily basis of course have a much longer lifespan. Due to hygienic reason, we do advise users to replace earplugs such as the Alpine PartyPlug after 1 or 2 years at the latest.