What It Is Heat-activated invisible styling spray that protects hair from humidity. What It Does Blissfully exist in any environmentfrom high humidity, to pollution-ridden or scorchingly sunnywith this heat-activated spray. Time-released actives form an invisible shield over every strand, protecting hair up to 450°F/232°C and against UV rays. Look smooth, sleek, frizz-free and just-done for 24 hours or more. It works. Weve got the proof.