Strengthen and protect hair with Bumble and bumble Hairdressers Invisible Oil Heat/UV Protective Primer, a heat protection spray that nourishes from root to tip. Powered by a multitude of conditioning ingredients, the primer forms a defensive barrier against the damage caused by hair straighteners, curlers and blow drys in order to prevent breakage and dehydration. The invisible spray softens strands, replenishes moisture and tames frizz for a healthy, smooth and sleek finish. Suitable for all hair types.