Soft, disposable earplugs offer a high noise reduction (32 decibels). Earplugs are independently tested NRR 33 and tested to ANSI S3.19-1974. Disposable hearing protection is made of self-adjusting foam that provides low pressure with excellent attenuation. Earplugs are easy to use. Soft, smooth foam formulation expands slowly to fit most ear canals comfortably. Dermatologically safe foam is nonirritating to the skin.