Kérastase Genesis Defence Thermique Blow Dry Primer Calm your heat-drying fears with Kérastase Genesis Defence Thermique Blow Dry Primer ($37). The product not only protects against heat damage, but it also prevents tangles so that you don't experience breakage when styling. Image Source: kerastase-usa.com Kérastase Genesis Defence Thermique Blow Dry Primer $37 from kerastase-usa.com Buy Now