Bumble & bumble Quenching Shampoo is an ultra-mild cleanser that begins treating hair without sapping moisture. Who: The terribly thirsty (from chronic dryness or repeated heat styling & brush strokes). When: Whenever you wash, followed by Bumble & bumble Quenching Conditioner. All Bumble & bumble products are: Cruelty free. Vegetarian. Vegan.