HamiltonBuhl's Flex-Phones(TM) are made from a single piece of EVA foam.
EVA is a safe, non-toxic, BPA free, soft, flexible and most indestructible product. Flex-Phones(TM) are certified for all major USA and International child safety testing standards. Recommended for children ages 3 and up. Flex-Phones(TM) grow with the children that use it, for smaller children just snap on the extension band for a snugger fit. The sound quality is clear, and most important, sound levels will never exceed 85 decibels to protect developing years. 3.5mm stereo plug for compatibility with tablets, mobile devices, computers, cd players and more! Available in red, blue and black.