Mack's Ultra SafeSound Earplugs are molded with state-of-the-art super low-pressure, skinned and tapered foam. These special features provide unmatched comfort and improved hygiene. With a high noise reduction rating (NRR) of 32 decibels, this high performance hearing protection can be used in environments where noise is just a nuisance up to environments with hazardous noise levels. For loud concerts , motor sports, sleep, shooting sports, power tools, etc. (30 pairs)