OEM Howard Leight ear plugs designed for single-use foam fitting that adjusts to every user in various environments. Featuring a Noise Reduction Rating (NRR) of 33 decibels, these ear plugs are ideal for use in areas with hazardous noise. The unique shape design ensures maximum in-ear comfort during extended use, while the soft material expands in your ear to resist backing out of the ear canal. Additionally, the smooth, soil-resistant skin helps prevent dirt buildup.