Feature a "no-roll", triple-flange design that provides quick, clean, and comfortable hearing protection. Simply hold the stem and push the earplug into the ear. The tip stays clean even if hands are dirty or gloves are worn. The soft polymer earplugs are washable and reusable so they don't need to be replaced as often, reducing waste and lowerings costs. Poly bag keeps earplugs clean prior to use. Recommended applications include assembly and mechanical, chipping, chiseling, cleaning, drilling, furnace operations, grinding, heavy equipment operations, machining, metal repair, painting, pouring/casting, power fastening, riveting, sanding, sawing and welding. These soft polymer earplugs are test compatible with the 3M E-A-Rfit Validation System and have a Noise Reduction Rating (NRR) of 25 dB. However, research suggests that many users will receive less noise reduction than indicated by the NRR due to variation in earplug fit, earplug fitting skill, and motivation of the user. It is recommended that the NRR be reduced by 50 percent to better estimate typical workplace protection. Blue Cords/Carry Cases. Corded/Cordless: Corded; Shape: Flanged; Material(s): Rubberized Molded Foam/Plastic; Noise Reduction Rate (NRR): 25 dB.