Cover made of ABS, padding made of PVC and PU, headband made of polyester PROTECT YOUR BABY FROM NOISE:Loud sounds can be quite harmful for babies, and every 8th child suffers from permanent hearing loss limits your infants exposure to loud noise during the early years. Whether it impairs sleep or potentially damages the hearing at busy events, ear protection for babies and toddlers is essential. NO PRESSURE ON FONTANEL:The head of a baby younger than 18 months is extremely vulnerable because of the not yet closed fontanelle. The Muffy Baby is a better choice thanks to its specially designed soft headband. It fits smoothly and without adding any pressure. ADJUSTABLE AND SAFE:baby and toddler ear protection has a safe and practical design, without any hard parts that can be harmfull or dangerous. Ear caps are made with multiple layers of noise reducing foam and soft padding for good closure. The upgraded headbands are anti-slip, comfortable and easily adjustable. TESTED AND CERTIFIED:Thoroughly tested and proven to reach noise reduction at 23 dB SNR in accordance with US & EU Regulations. Sustainable hypoallergenic material without silicone, BPA free; no allergic reactions or irritations The baby noise cancelling headphones come with a carrying pouch.