TruGuard, Tri-Flange Ear Plugs, Unique Flange & Disc Design Work To Comfortably Seal Off The Ear Canal, Removable Neck Cord For Added Versatility, High Noise Reduction Rating NRR 25, Soft, Neck Cord Is Comfortable Against The Skin, Includes A Convenient Pocket Size Storage Box To Keep The Plugs Clean & Available.