Check the listing for details. 3M 310-1001, E-A-R Classic Earplugs, Uncorded, Pillow Pack, Regular Size, 1 Pair. Condition: New. Listed at 7.00 USD. Innovative design, the first foam earplug featuring a cylinder shape The 3M™ E-A-R™ Classic™ Earplugs set the industry standard for personal safety noise reduction as the worlds first foam earplug. Soft, slow-recovery foam is designed to mold to the shape of the ear canal and provide hearing protection. These disposable earplugs come with or without cords; an optional dispenser box is sold separately. A cylindrical shape is suited to fit most sizes, with a 7% smaller version also available for smaller ear canals and a 20% longer version for larger ear canals.Innovative designThe first foam earplug featuring a cylinder shape. Even in humid environments, the moisture-resistant foam helps provide more comfort.