EAR PROTECTION compatible BABIES IS ESSENTIAL | The world nowadays is filled with loud noises and harsh sounds. These sounds can harm a baby's sensitive ear structures, resulting in noise-induced hearing loss (NIHL). As your child grows and develops, it requires protection GIVE YOUR BABY A QUIET WORLD | Reducing noises in an infant's environment, such as sleeping, parties, flights, trains, concerts, stadiums, sounds from a vacuum cleaner, lawnmower, fireworks, movies, tv, etc Fastening: Buckle Portable Blue-2 NO PRESSURE ON FONTANEL | The head of a newborn younger than 18 months is extremely vulnerable because of the not yet closed fontanelle. And there is no pressure on the top due to the soft and flexibleheadband SAFE & CERTIFIED | Tested and proven to reach noise reduction at 30 dB NRR following US & EU Regulations COMcompatibleTABLE & PORTABLE | The washer and sponge of this earmuffs are constructed of skin-friendly materials, provide comcompatiblet, and are foldable and portable Dear: Since the filling sponge may have been shaken and shifted during the long-distance transportation of the earmuffs, you simply need to take it out and knead it, and gently refill the earmuffs