Honeywell MAX Disposable Foam Earplugs, 5 Pairs with Carrying Case (RWS-53001) Highest noise reduction rating of any single-use earplugs; most used PE foam earplugs worldwide Bell shape matches contours of your inner ear to ensure maximum noise reduction and resist tendency to back out of ear canal Smooth, soil-resistant closed-cell foam skin helps prevent dirt build-up Polyurethane foam enhances comfort, especially for long-term wear; 5-pair package with carrying case Noise Reduction Rating 33