What it is:A heat-activated leave-in conditioner.What it is formulated to do:Detangle hair and defend against damage from thermal styling, UV rays, and wet combing. Three natural proteins plus Panthenol smooth and moisturize hair.What else you need to know:Each of the Fekkai COIFF? products is multi-functional in form, but sheer in formula-made to wear alone, or layer limitlessly. Defense is part of the COIFF "Pre-Style" group, meaning that it should be used on clean, damp hair, before other styling and/or finishing products, to make the perfect foundation for your look. Alcohol-free and safe for color-treated hair.