DNA tags may be an effective tool to authenticate denim. The tag maintains its integrity even after the rigors of bleaching and abrasion, according to a new study by Applied DNA Sciences and the Fashion Institute of Technology (FIT). DNA tags may soon undergo testing at a full manufacturing facility to verify the authenticity of a finished denim garment. The study has been published in the AATCC Review, a publication of the American Association of Textile Chemists and Colours.