It's a combination of our popular Ultra Hydration and Retinol Night Serum. This product contains hyaluronic acid and anti-inflammatory ingredients to minimize irritation and soothe your skin while still providing all the benefits of all-trans retinol. Excellent for first time retinol users! Renews and hydrates your skin by building collagen, diminishing fine lines and wrinkles, and creating firmer, more evenly toned skin.