What it is: A lightweight, water-based treatment serum starring hypochlorous acid that's more intensive than SOS Spray (but still as gentle!) to help soothe chronically sensitive, inflamed skin.Highlighted Ingredients: - Hypochlorous Acid: This acid is naturally produced by the body's immune system as a first line of defense to fight the appearance of redness and defend against bad bacteria. When applied topically, it soothes, purifies, and cares for sensitive or stressed skin—leaving it looking clear, soft, and healthy.- Water and Sodium Chloride: This isotonic (non-drying) solution is formulated to mimic the makeup of our own bodies—it is the optimal delivery solution for hypochlorous acid since it is found naturally in your white blood cells.Ingredient Callouts: This product is gluten-free and cruelty-free.What Else You Need to Know: This serum is 100% natural, derm-tested, and clinically proven. Powered by a concentrated dose of hypochlorous acid, a heroic anti-inflammatory and anti-bacterial, this liquid-to-gel serum delivers softer, clearer-looking, and happier skin. This unique solution is pH balanced (4.5), alcohol-free, and formulated for facial use, but also safe to use to use anywhere on your skin. This product also has the National Eczema Association Seal of Acceptance™.CLEAN at Sephora is our commitment to offering formulas that go beyond regulatory standards to avoid controversial ingredients without sacrificing on effectiveness.