Whether you are a musician, attend concerts or are regularly exposed to music played at high levels, Earasers don't plug up your ears and muffle sound like more conventional earplugs. Manufactured by a 50 year old hearing aid company, and developed by their lead engineer - a musician for over 20 years - Earasers filter out loud noise while still allowing you to hear at a safe, comfortable level. • MFSKU M2L • UPC 854588003935