3M OCS1135 Ear Soft Yellow Neons, Earplugs (Case of 200) N/A Soft, pliable foam offers comfort for wearing over an extended time Earplugs are easy to roll down for quick and easy insertions Poly bag keeps each pair of earplugs clean before use Bright yellow allows quick compliance checks Noise Reduction Rating (NRR) 33 dB, CSA Class AL Noise Reduction Rating of 33 dB Highest NRR available Self-adjusting foam provides low-pressure seal Dermatologically safe foam is nonirritating to skin Made in the U.S.A.