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.Flex-Phones are certified for all major USA and international child safety testing standards.This color pack comes with 5 Flex-Phones, one in each color - BLUE, BLACK, RED, GREEN and PURPLE