This was included in the set that I bought. It came along with a hair treatment and shampoo. I got this after I bought the overnight repair serum.
I apply this after bath when I know I'll have to curl my hair with a curling iron. I use this and my heat-protectant spray to make sure my hair won't be damaged with the hot tool. This actually smells good. I only use a tiny amount so as not to weigh down my hair. It's quite pricey, but I've never been disappointed with Kerastase products so it's a good investment.
Kerastase Resistance Ciment Thermique Leave-in Milk
PROS: it protects my hair from damage whenever I'll use hot tools on my hair, it smells really good, it leaves my hair soft even the next day, locally available
CONS: quite pricey
I will definitely repurchase!
Where To Buy:
Kerastase Ciment Thermique
PHP1.8k (more or less), Fix Salon