Tested according to ANSI Specs S3.19-1974
The level of noise entering a person's ear, when hearing protector is worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR.
Noise Reduction Rating 32 Decibels (When used as directed)
The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (Higher numbers denote greater effectiveness)
Ear plugs must be inserted properly for optimum performance.
Practice of insertion is recommended. Please refer to the audio and video instructions at HEAROS.com. discard product after several uses or as soon as dirt or wax accumulates on ear plugs.