The Pai Instant Kalmer Ceramide Serum (£49) truly lives up to its name. Thicker than your average serum, the lightweight gel feels calming and soothing on your skin, leaving it softer, plumper, and even less red than it was before you put it on. You can peace of mind when using it, too. Made with three different plant-based ceramide molecules and sea aster, the serum is free of any potentially irritating essential oils or synthetic fragrances.