Special, soft and smooth foam formulation with the highest noise reduction rating available. Regular size fits most ear canals; Shaped, self-adjusting foam provides a comfortable, low-pressure seal; Non-irritating, dermatologically safe foam; Soft foam plugs are easy to roll down and insert, then expand within the ear canal for maximum comfort; NRR 33dB; ANSI S3.19; caseA Class AL. This product is equivalent to part number: S-12514. Alternate UPC: 10080529910049. Sold in a quantity of 500 per case.