A layer of the new La Mer Perfecting Primer (£70) underneath your foundation and/or concealer will not only keep your base makeup in place for the day, but it will also smooth out any uneven texture (whether that's fine lines or acne scarring), calm down any redness, and give your skin a soft, natural-looking glow. And because it's infused with the brand's proprietary "Miracle Broth" complex, it keeps skin plump and hydrated, too, making it an ideal option for either mature or dehydrated skin.