HB3 Technology isthe revolutionary product that allows headphones to be fully integrated into hooded garments. The patent-pending technology allows for an electronic update to a wide variety of garments. HB3 Technology is a standard headphone jack located in the garment's pocket that is compatible with most MP3 players and offers dynamic sound quality. The earbuds are located at the end of the garment's drawstrings. The entire component is 100% machine washable. HB3 Technology can be found in some of the world's most recognized brands and is featured in HoodieBuddie and Insound garments.