All hearing protection carries an NRR rating. This stands for Noise Reduction Rating. The higher the number the more protection the product offers. Ear Muffs Disposable Earplugs Banded Hearing Protectors E-A-R UltraFit Plus Earplugs EAR Classic SuperFit Earplugs - CLOSEOUT Thank you for visiting FISCO's on-line store. Visit us again soon!