The NoNoise Ear Hearing Protector Cord is a great accessory for those that use NoNoise hearing protectors frequently. Simply insert them into back of the earplugs. There is a sound port built into the connector that allows the filter to work normally at the same time reducing the decibel level by 2 additional points. The NoNoise Hearing Protector Cord is designed to work with all NoNoise earplugs however they are not designed to be used when wearing a helmet.
