Aearo Ear Foam Earplugs - Yellow Part No. 312-1201 200 Pair per Case NRR 29dB. Soft, Energy-absorbing foam, comfortable and easy to use. Individually wrapped Packaged. Easy to insert and remove. Provides a comfortable seal. One size fits most ear canals. Plugs are small and easily carried and they can be worn with earmuffs to further reduce noise levels.