Mack"s® Hear Plugs® use patented filter technology to replicate the natural response of the ear canal so that sound is not muffled and music is heard clearly, but at a safer, reduced volume. The soft flanges enable maximum comfort, while the firm stem allows fast, easy insertion. With a convenient detachable neck cord and a noise reduction rating (NRR) of 12 decibels, Mack"s® Hear Plugs® are perfect for concerts, jam sessions, nightclubs, sporting events, shop work, etc. Shatterproof carrying case included. (1 pair)