Honeywell R01669 Single-use, foam earplugs provide the right fit for every user in every environment. Noise reduction rating of 33 allows you to comfortably work in areas with high levels of hazardous noise. 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.