You finally get the colour just right, then you use your flat iron and the weather changes and all of a sudden your hair is changing. Heat and UV crack the cuticle and speed up fading, and colour-treated hair, already more porous, frizzes and dulls the moment humidity hits. So the very tools and days that you style your hair, you are quietly undoing your colour.

This lightweight leave-in lays an invisible micro-thin film over each strand that shields against heat up to 230°C (450°F), UV, humidity and the oxidative stress that fades colour, all in one step. Lactic acid resurfaces and seals the cuticle so hair looks smooth and glossy, and centella asiatica adds regenerative care, without any weight. Smooth it through damp hair before styling, or over dry hair to knock down frizz.

Right away, hair looks smoother and shinier, and frizz drops noticeably, with Kérastase measuring 96% better moisture retention and 77% less colour-induced frizz. Used before every hot-tool session, it keeps your colour truer and your style smoother, so your shade and your blow-out both last longer.