Max® Foam Disposable Earplugs• The world’s most-used polyurethane foam earplug • Bell shape delivers maximum in-ear comfort • Contoured design easier to insert, resists tendency to back-out of ear canal • Polyurethane foam enhances comfort, especially for long-term wear • Smooth, soil-resistant skin prevents dirt build-up • Attenuation tested in accordance with ANSI S3.19-1974 • NRR 33 dB, CSA Class AL200 pair uncorded or 100 pair corded per box