3M EAR™ TaperFit 2™ Uncorded Ear Plugs (SLC80 26dB, Class 5) Amount:50 Pairs here is advice from Earasers:

here is advice from Earasers:

Calmer Pro has been independently tested by the ISVR (Institute of Sound and Vibration Research) at the University of Southampton

Normal battery life is approximately 100 hours

They’re ideal for use in extremely loud environments such as airports

3M EAR™ TaperFit 2™ Uncorded Ear Plugs (SLC80 26dB, Class 5) Amount:50 Pairs here is advice from Earasers:Soft, roll down foam earplugs conform to the unique shape of each ear canal to provide a low pressure, comfortable seal. Offered in two sizes to fit most ears comfortably. Soft, roll down foam earplugs expand to fit the earcanal and provide a low pressure, comfortable seal. Poly bag keeps each pair of earplugs clean before use. Noise Reduction Rating (NRR)*: 32 dB. CSA Class AL. Test compatible with 3M E A Rfit Validation System. *The NRR may