3M Lawn and Garden Disposable Earplugs, used to help protect ears against noises at or exceeding 85 decibels such as lawn mowers and trimmers are made of a smooth, soft foam formulation expand slowly to fit in most ear canals comfortably. 3M Lawn and Garden Disposable Earplugs feature a Noise Reduction Rating (NRR) of 32 decibels. Disposable, comfortable, lightweight and easy to use, 3M Lawn and Garden Disposable Earplugs are a great choice in hearing protection for both the professional and Diyer working on outdoor projects.