... non-allergenic and non-irritating. Comfortable, good noise reduction effect, 1.foam earplugs, soft,comfort, noiseproof feature, useful2..low cost, all ... , soil resistant skin is non-allergenic and non-irritating.5.outstanding performance in a variety of temperature and humilities.6.this earplug ... , protect, traveling,air or others. Foam earplug HK-1107A PACKED IN PLASTIC BOX