The Peter Thomas Roth Water Drench Hyaluronic Cloud Serum is one of the newer launches from Peter Thomas Roth Skincare. Like the serum, the entire range has been designed to deliver an impressive amount of hydration, without the heaviness that you would typically associated with moisturizing and hydrating products. The Cloud Serum is one of the best examples of this concept as it contains an incredible 75% hyaluronic acid. Hyaluronic acid can hold up to 1,000 times its weight in water, making it one of the most beloved and sought after humectant ingredients on the market. In addition to hyaluronic acid, this formula also contains silk proteins, sodium PCA and a unique mineral complex which work together to hydrate and soothe dehydrated and irritated skin.