Moldex SparkPlugs disposable ear plugs utilize a tapered design for easy insertion in any size ear canal. They are made with non-irritating, smooth surface for added comfort. Moldex SparkPlugs come with several fun colors in each package. These ear plugs have a 33 Noise Reduction Rating (NRR 33) The highest certified protection rating available. 100 pairs of individually bagged earplugs with cord.