Nylon, ABS, Foam Imported [Baby Hearing Protection]: Specially designed for babies and toddlers of age 3 months to 36 months; 25dB Noise could be blocked ( SNR 25dB EU certified) in average. Infant eardrums are more fragile, every year there will be babies who are not protected their ears and caused hearing loss. It’s important for parents to get suitable ear muffs to protect your loved babies’ hearing from our noisy environment. [Ultra Soft & Safe Material]: Soft ear pads are made of noise reduction foam material covered with artificial leather. Muff shells are made of ABS - hard and anti-pollution. Elastic headbands are made of mixed colored polyester - soft, comfortable and adjustable to fit different sizes of heads. Strict products and material tests could be ensured for suitability of infants and toddlers. [Anti-slip]: There is a non-slip strip on the headband, which can effectively prevent the headband from slipping into the eyes when using ear muffs. [Multiple Uses]: Works for sleeping, travel, parties, festivals, fireworks and all loud noise. In order to protect the baby's hearing, you’re not recommended to leave your babies in super high noise environment such as shooting range even if wearing earmuffs. [Convenient to Travel]: Baby soundproof ear muffs are lightweight and easy to carry, comes with a carrying bag, whether on the plane, train or car, you can provide a quiet environment for the baby. This earmuff is specially designed for babies. It is made of comfortable and soft sponge material, smooth surface, which care for baby's soft skin and will not cause pressure to the head.