A non-toxic, safe, BPA-free foam, EVA, short for ethylene-vinyl acetate, has been hewn into a single foam piece to create the child-friendly Hamilton Buhl Flex-Phones. Because of its design and material, these headphones are flexible and soft yet indestructible. To guarantee your child’s safety, Hamilton Buhl had them tested and certified as safe by all major International and American safety standards for children. Best used by kids age 3 and older, these Flex-Phones are specially designed to grow with them! While they are still at their smallest, simply snap in the adapter at the top to create a better fit. Once they outgrow that, the adapter can be snapped back off. As protection is the number one concern, the Flex-Phones are programmed to go no louder than 85 decibels so as to safeguard their delicate ears. Producing nothing but the highest quality in stereo sound, Flex-Phones are fitted with a 3.5mm plug, making them perfect for use with any electronic device. Flex-Phones are available with discounted quantity pricing from Encore Data Products. Color choices include black, red and blue headphones.