You're finally growing your hair out, but you still want to blow-dry and straighten it, and that heat is quietly working against your progress. The lengths and ends you've spent months growing are the most fragile part of your hair, and styling them without protection can snap and split them. So you can lose length at the bottom about as fast as you gain it up top, which is a big reason hair can feel like it never gets any longer.

This leave-in primer is for hair you're growing long; smooth it through the lengths and ends before you style. It shields hair from heat up to 230°C so hot tools stop breaking off your length, while a blend of vitamins, wheat protein, and nourishing fatty acids strengthens and seals the ends against splitting. It detangles as it goes, so there's less tugging and snapping too. Pair it with the Extentioniste shampoo when you're growing out your hair.

Right away, hair blow-dries smoother and detangles more easily, with less snapping as you style. Because it protects your lengths from heat every time, you lose less of your hard-won length to breakage, so over the months, your hair can hold onto more of what it grows.