Loreal INOA Ammonia Free Permanent Color is probably one of the most revolutionary hair color products to be produced in decades, and it provides a number of benefits over traditional professional hair color treatments. 100% ammonia free colour treatment and therefore odourless - no toxic ammonia fumes . Delivers optmised scalp comfort and reduced chances of irritation or allergic reaction . State of the art 2 part oil delivery system resulting in smoother hair texture and more protected hair quality from root to tip.