Shop Peter Thomas Roth Water Drench Hyaluronic Cloud Serum, 1 fl oz online at Macys.com. Intense 75% hyaluronic acid complex helps keep skin hydrated. An invisible veil of hydration attracts up to 1,000 times its weight in water from moisture in the atmosphere. Helps replenish the appearance of aging and dehydrated skin with vital moisture, imparting a look of youthful radiance. Helps smooth out the appearance of fine lines and a rough texture.