These soft polyurethane foam hearing protection plugs give you a customized fit by conforming to the contours of your auditory canals and blocking out loud noises that cause hearing loss. HEAROS Earplugs have been tested according to ANSI specifications S319-1974 for your peace of mind. HEAROS Ear Plugs are made of hypoallergenic foam, making them safe for the most sensitive ears. A soft, closed-cell skin prevents dirt build-up and permits comfortable wear for long periods. Hearos unique formula and design lets you roll the plugs between your fingertips and then insert them in your ears. Enjoy the game from the 50-yard-line, block out your snoring spouse, or enjoy your new book in solitude. With NRR 33 being the highest grade for foam ear plugs, these noise-cancelling HEAROS Ear Plugs combine superior comfort and protection for your hearing. Make a sound choice for your hearing health.