Pack includes both the Retinol 0.5% and 1.0% Skin Serums to actively correct and perfect the skin night after night. Each potent serum works to address the appearance of fine lines, wrinkles, uneven texture and sun damage through the use of Retinol, Hyaluronic Acid, Vitamin E and Soluble Collagen. Suitable for experienced Retinol users, this kit allows for quick and easy progression from one step to the next.