1. Reusable Silent Earplugs: noise cancelling earplugs effectively reduce harmful decibel levels of noise for people with sensitive hearing without altering the clarity of the sound. earplugs feature a unique noise filtering design with a noise reduction rating (NRR) of 25-28 decibels for an excellent listening experience. 2. Comfortable To Wear: The silicone earplugs are available in three sizes of skin-friendly silicone ear caps in S/M/L. The looped flow design fits most children, women and men's ear canals, improving your comfort for long-term wear while protecting your hearing and the best earplugs for sleep. 3. Multi-Purpose Earplugs: provide protection from loud and background noise in many situations. They are suitable for sleeping, meditation, work, sports, shooting, motorbike riding, travelling or commuting, concerts (to preserve sound quality), festivals, parties and more. A great gift for concentration, anxiety relief and safe listening. 4. Please Note: earplugs mainly block out unwanted noise and reduce the volume heard, but they are not completely silent. While blocking out noise, they are breathable and balance the pressure difference between the inside and outside of the ear. With the earplugs in, you can hear other people's voices.