The non-corded earplugs offered by Rothco feature a noise reduction rating (nrr) of 33. The soft foam earplugs offer superior comfort and outstanding protections; and the tapered shape makes it easy for insertion. Hygienic-use once and discard compliant to ANSI S3.19-1974 carries CE certified symbol on box & individual poly bags each pair is individually wrapped in a poly bag. 200 pairs per box.