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. Alternate UPC: 10080529120639. Sold in a quantity of 200 per case.