HamiltonBuhl® Flex-Phones™ are made from a single piece of EVA foam. EVA is a safe, non-toxic, BPA-free, soft, flexible, nearly indestructible product. Flex-Phones™ are certified for all major USA and international child safety testing standards and are recommended for children ages 3 and up. Most importantly, the extremely clear sound quality will never exceed 85 decibels, ensuring young developing ears are protected. Flex-Phones™ are packaged with a snap-on extension band for smaller children – just snap on the extension band for a more snug fit. Flex-Phones™ headphones feature the exclusive Dura-Cord™ – the chew, kink and knot-resistant, PVC-jacketed, braided cord. Available in 5 great colors: Red, Blue, Black, Green and Purple.