SECURE: Exposed cell surface texture resists movement and helps maintain an effective seal creating a comfortable, snug noise barrier. Noise Reduction Rating (NRR) 29 dB. CSA Class AL | OUTSTANDING COMFORT: This unique slow recovery, low pressure foam and special cylindrical shape help enhance comfort throughout the day by creating lower pressure in the ear canal | SOFT SOUND ABSORBING FOAM: Proprietary foam is initially firm to make fitting the ear plug easier, then softens once it’s in the ear to comfortably conform to the unique shape of each ear canal | SWEAT AND HUMIDITY RESISTANT: Classic ear plugs are resistant to moisture absorption for consistent fitting even in humid environments | VERSATILE: Use while chipping, chiseling, drilling, furnace operations, grinding, heavy equipment operations, machining, pouring/casting, power fastening, riveting, sanding, sawing and welding | CLEAN STORAGE: Reusable pillow pack helps keep earplugs clean when they are not being worn | Noise Reduction Rating of 29 dB | Moisture-resistant dermatological ally safe foam is not irritating | Slow recovery PVC foam provides comfort with low pressure | Comfortable and easy to use | Noise Reduction Rating of 29 dB | Moisture-resistant dermatological ally safe foam is not irritating | Slow recovery PVC foam provides comfort with low pressure | Comfortable and easy to use | Made in the U.S.A.