Earplugs Classic PVC Foam Diposable 10 Pack Reusable Pillow Pack helps keep earplugs clean when they are not being worn. Slow-recovery earplug foam is flame-resistant and moisture-resistant Test compatible with 3M E-A-Rfit Validation System. Noise Reduction Rating (NRR)* 29 dB. CSA Class AL 10 pairs packed in 10 pillow packs.