Allen Company Light Weight Low Profile Sound Sensor Hearing Protection, NRR27 Outperforms electronic protection with a noise reduction ration of 26 5.75" x 2.5" Extremely light weight, only 1.7 oz. Adjustable headband also folds to fit into pocket, extra foam ear cushions included Allows easy conversation without "echo" effect Filters out most damaging sound frequncies, NRR of 27