Flanged ear plugs have multiple, tapered fins that flex for a comfortable, yet snug fit in your ear canal. - The fins also create pockets of air to help block out noise. Disposable/ Reusable / Reusable Noise Reduction Rating NRR / 27 dB Insertion Method / Push-In Ear Plug Color / Blue Ear Plug Material / Vinyl Ear Plug Shape / Flanged Ear Plug Size / M Cord Options / Uncorded Pairs per Package / 100 Ear Plug Packaging / Bulk Box Ear Plug Pair Pack Type / Plastic Bag Series / AirSoft(R) Standards / ANSI S3.19-1974 Tested