3M™ E-A-R™ Classic Plus Uncorded Earplugs set the standard in hearing protection as the world's first foam earplugs. Constructed from slow-recovery foam,the disposable earplug conforms to the shape of the ear canal for premium hearing protection. 3M™ E-A-R™ Classic Earplugs provide all the benefits of the 3M™ E-A-R™ Classic Earplugs with the advantage of a longer body for higher noise reduction when inserted into the ear canal. 3M™ E-A-R™ Classic Plus earplug is 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.