treatment

Kerastase Resistance Extentioniste Thermique

It is a treatment. This product is really good.

After shampooing and towel-drying, on wet hair

Squeeze out just a little, apply it evenly, and then blow-dry.

It prevents heat damage and is a leave-on treatment, so your hair will become really healthy!! You definitely need to buy Thermique products. There are other options too.