Gifts & boxes: what if we offered hair products? Once is not customary, Kérastase offers this year again magnificent gift boxes. A shampoo, a thermal and a treatment, for a complete hair treatment that really makes the difference. And why ? Because you should always use three to four products from the same range to REALLY benefit from the effects of the care. Yes, when used in combination, products from the same range provide more pronounced effects on the hair. Thus, to fully benefit from the benefits of a range of hair products, you should not be satisfied with the shampoo from the range in question!