For superior comfort, wear Black & Decker Hearing Protection. These ear plugs come in several styles. They include corded, disposable, reusable, and uncorded styles. The ear plugs are rated between 25 NRR and 32 NRR. Foam style ear plugs from Black & Decker have a tapered shape and provide a soft and comfortable seal in the ear canal. These are ideal for industrial jobs, factories, warehouses, and landscaping work.