The most popular earplugs on the market. Slow-recovery foam helps ensure comfort and minimize pressure; Bright yellow color provides a quick visual compliance check; Dermatologically safe foam is non-irritating, nonflammable, and moisture-resistant; Our convenient pillow pak keeps each pair clean and available for re-use; NRR 29dB; ANSI S3.19-1974; caseA Class AL. This product is equivalent to part number: S-7028. Alternate UPC: 10080529100006. Sold in a quantity of 200 per case.