Additional Details ------------------------------ Bullet point: PROTECTS HEARING WHILE PRESERVING SOUND CLARITY - Hear the full spectrum of sound without the muffling effect experienced with other earplugs. Mack?s Hear Plugs' unique and patented open-air membrane filter technology ensures clear, natural sound, and comfort, while reducing harmful noise. Noise Reduction Rating (NRR) ? 12 decibels. Directions: 1. To use the earplugs, first remove them from their packaging and choose the appropriate comfort tip size for your ear canal. 2. Insert the earplug into your ear canal, ensuring a snug fit. 3. To change the ear tips, remove the filter by gently squeezing the ear tip immediately below the filter until it 'pops' out of the ear tip. 4. Insert the new filter at an angle, pushing the lower side of the filter first, and then press down on the filter logo to correctly position the filter in the cavity of the ear tip. 5. Remember to remove the earplugs slowly with a twisting motion to gradually break the seal and avoid rapid removal, which may damage the eardrum. 6. Clean the earplugs as needed by washing them gently with warm, soapy water and allowing them to dry completely before reusing. 7. Store the earplugs in the provided travel case to keep them clean, convenient, and ready-to-go.