Moldex Goin' Green PlugStation Earplug Dispenser contains 500 pairs of earplugs and the plugs are made of extra-soft, extra light foam. Their tapered shape fits easily in the ear canal, allowing them to seal gently and snugly without pressure. Plus, the outer surface of the earplug is smooth, so it doesn't irritate the ear canal. They're so comfortable you'll forget you're wearing earplugs. The noise reduction is rated at 33 dB.