If you’re looking for a lightweight hydrator to boost the efficacy of your current moisturizer, you may want to look into the Kiehl’s Hydro Plumping Re-Texturizing Serum Concentrate. This product was designed to serve as a moisturizing, hydrating serum. But like other hydrating serums on the market, this product from Kiehl’s offers a little more heft. Most hydrating serums contain large quantities of humectants, which draw water onto and into the skin. The Re-Texturizing Serum Concentrate is no different in this aspect, and has a large percentage of glycerin contained in this formula. But without a proper occlusive, these humectants can actually further dry your skin. To combat this, the Kiehl’s Hydro Plumping Re-Texturizing Serum Concentrate contains a few variants of silicones, which act as occlusives to keep moisture on the skin. Although dimethicone and other silicones often get a bad wrap, they can actually be great ingredients to trap water in the skin. That being said, if you know you’re sensitive to silicones, this product is probably not the best option for you.