SKIN ROCKS by Caroline Hirons THE AMPLIFIER 100ml Performance Enhancing Essence is a daily use moisturiser suitable for all skin types. This UK-origin product contains hyaluronic acid, peptides, and vitamins to hydrate and nourish the skin on the neck and face. With a 12-month period after opening, this 100ml bottle from the Skin Rocks product line promises to enhance skin performance and provide a boost to daily skincare routines.