Moldex Meteors PlugStation Earplugs Dispenser contains 500 pairs of earplugs and the plugs are made from soft, slow recovery foam. Earplugs feature a curved shape which fits smaller ear canals and have smaller diameters that exert less pressure. Earplugs feature an undercut design for a secure fit and the big base helps in proper insertion and removal. The noise reduction of the plugs is rated at 33 dB.