Peter Thomas Roth Water Drench Hyaluronic Cloud Mask Hydrating Gel 5.1 oz New New in Box 5.1 Ounces. mp A refreshing gel mask that drenches skin with a 20% Hyaluronic Acid Complex while helping to nourish, soothe and energize the look of a dull and dehydrated complexion. Ships fast Comes from a smoke free home Apply generously onto clean skin, avoiding the eye area. Leave on for a minimum of 3 minutes. Rinse off. For an intense and cooling Hyaluronic Acid treatment, use as often as needed. To help provide up to 72 hours of hydration* with Pentavitin, use twice daily AM and PM. For external use only.