Moldex ® Earplugs, Proudly MADE IN USA 50 Pairs SPARKPLUGS ® Moldex. NRR 33 Blocks out all manner of noise while protecting your hearing Value Priced. Extra-soft, lightweight foam for all day comfort. Tapered for a snug fit while gently conforming to the ear canal. Non-irritating smooth surface Easy to use, shaped to fit even very small ear canals Comes with a handy pocket pack carrying case that provides hygienic storage of plugs