3M 1100 Polyurethane Foam Earplugs, 29 DB NRR, Orange3M 1100 earplugs are made from soft hypoallergenic PU foam material to provide maximum comfort and low pressure inside the ear. The tapered design fits most ear canals and is making the plugs easier to use. Its smooth, dirt resistant surface provides better hygiene, durability and comfort. Soft foam earplugs to provide maximum comfort and low pressure inside the ear Smooth, dirt resistant surface provides better hygiene, durability and comfort