Serenity Choice Sleep ear plugs reduces the sound level by 24 dB, eliminating or reducing sound to a non-intrusive level.  The packages come with small, medium and large size sleeves to fit most ears. These Serenity Choice Work ear plugs have an SNR value of 24 dB and an NRR rating of 16 dB. These will not block out quite as much sound as a well fit set of foam ear plugs, but should be much more comfortable to wear all night long.