OEM 3M Push-Ins corded earplugs designed for effective noise reduction with a Noise Reduction Rating (NRR) of 28 dB. Each pair is kept clean in a poly bag until use, ensuring hygiene and convenience. The blue stem facilitates easy insertion and removal, while also helping to keep the tips clean when hands are dirty. Tested for compatibility with the 3M E-A-Rfit Validation System.