3M™ E-A-R™ Classic Earplugs are an economical, reliable choice in hearing protection and conservation. The slow recovery foam used to create these ear plugs, provides a flame resistant, moisture resistant and sound resistant barrier for the ear canal, along with a deeper fit in the ear canal making the 3M™ E-A-R™ Classic Earplug one of the most widely used foam earplugs today.