Kerastase Resistance Ciment Thermique leaves hair easier to style. This heat-protecting leave-in is designed to care for weakened hair. providing essential nourishment and protection from styling tools. It helps shield hair from heat damage up to 450F. reducing breakage caused by blow-drying and other heat styling. As it nourishes the hair fibers. it enhances smoothness and adds shine. leaving the hair looking glossy and feeling more manageable.