Kiehl's Abyssine Serum ($45 for 1.7 oz) is a light weight but concentrated anti-wrinkle serum. I'm currently on the third bottles in the last 6 months. Not having wrinkles yet, I can't tell whether it helps to prevent them. But it hydrates and smooths out my skin. I apply Abyssine twice a day before the daily moisturizer. My skins is much smoother with this serum than without it. When I travel to humid regions, I don't even need a lotion or moisturizer. Abyssine Serum is hydrating and nourishing enough to maintain a smooth and even skin.