The Filler is Solution 1 of Lierac's Anti-Wrinkle Protocol, a quick-acting treatment for all types of wrinkles and fine lines. Its fast-absorbing gel contains pure high- and low-molecular-weight hyaluronic acid, which smooths the surface and plumps the skin, for an immediate blurring effect. It comes with an applicator tip for precise use. The formula is fragrance-free and has 95% natural-origin ingredients. It pairs with Pure Retinol The Cream (Solution 2).