Single-use, foam earplugs provide the right fit for every user in any environment. Noise reduction rating of 32 allows you to comfortably work in areas with high levels of hazardous noise. Vibrant colors make compliance checks quick and easy. Unique shape design delivers maximum, in-ear comfort during extended use. Soft material expands in your ear to resist backing out of your ear canal. Smooth, soil-resistant skin helps prevent dirt buildup. Bulk refill bag is designed to refill Leight Source 400 dispensers (sold separately).