The highest NRR rating available! MAX® pre-shaped foam earplugs feature a smooth outer skin for maximum user comfort. The NRR 33 rating makes the MAX® the highest attenuating disposable earplug in the U.S. The smooth, soil-resistant skin helps prevent dirt from penetrating the surface prior to insertion. Attenuation tested in accordance with ANSI S3.19-1974. Coral color, packed in poly bags.