The Head Foam body is made from a single piece of EVA foam. EVA is safe, non toxic, BPA free, soft, bendy, nearly indestructible, shatterproof and just plain fun. The Head Foams have departed from conventional headphones with moving plastic and metal parts and mechanisms. They have been certified for all major USA and International child-safe testing standards. Head Foams provide comfort to the children and peace of mind for the parents. Recommended for children ages 3 and up. The Head Foams size fits most heads and for smaller children just snap on the included extension pad for a snugger fit. The sound quality is crisp, clear, deep and the output has a limiter to ensure that sound levels never exceed 85 decibels; to protect developing ears. Both boys and girls will love it. Head Foams come in 3 exciting colors. They are cool to wear and will accessorize every lifestyle.