These headphones 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. This pack comes with one of each of the 5 great colors: Red, Blue, Black, Green and Purple. These are compatible with iPods, iTouches, MP3 Players, iPhones, Cell Phones, iPads, Tablets, eReaders, PCs, Macs, CD Players, Stereos, TVs and Most Gaming Systems Storage Bag: Anti-Lice, heavy-duty, write-on, moisture-resistant, reclosable bag. Helps prevent the spread of lice! When sealed in the bag, lice are killed in 24-48 hours without the use of chemicals Optional Accessories HygenX25 - Disposable sanitary ear cushion covers (box of 50 pair)