3M Yellow Ear Plugs Pack 500's3M Yellow Ear Plugs Pack 500's EARSNRBAG3M E A RSoft Yellow Neon Earplugs Uncorded. The 3M E A R E A RSoft Yellow Neon Earplugs are made from a slow expanding polyurethane foam material. A plug that gives evenly distributed pressure allowing flexibility and a good seal with optimum comfort. The 3M E A R E A RSoft Yellow Neon Earplugs offer exceptional comfort with high levels of protection, made from slow expanding polyurethane foam material and is