HamiltonBuhl Flex-Phones are made from a single piece of virtually indestructible EVA foam - Kids Can "Twist-'Em, Turn-'Em, But They Can't Break 'Em! EVA foam is safe, non-toxic, BPA-free, soft and an extremely flexible material. Recommended for children ages 3 and up, Flex-Phones deliver excellent, clear sound quality that will never exceed 85 decibels, ensuring young developing ears are protected. Headband includes a snap-on band for smaller children - just snap on the extension band for a more snug fit. KIDS-PPL