With an NRR 27 rating, the Rockets reusable earplugs provide serious protection for most noisy environments. Tested independently in an accredited laboratory to ANSI S3.19-1974. The air bubble in the tip provides cushioned Rockets earplugs can be washed and reused. Each pair comes with a Pocket-Pak carrying case to keep them clean when not in use. The smooth shape slides easily into your pocket. No sharp edges comfort for all-day wear. The soft, flexible flanges provide a superior seal and fit most size ear canals. Qty: 6 pairs. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.