Both an overnight mask and and a multipurpose balm, the Marie Reynolds Butter Balm (£48) helps to hydrate the skin, heal very dry patches (like on your elbows or heels), and soothe sunburns (although, please always make sure to wear your SPF . . . all the time!). Lightweight yet extremely rich and creamy, the balm contains a whole slew of butters (shea, cocoa seed, and mango) and oils (sea buckthorn, avocado, apricot, and baobab, to name a few), as well as vitamin E, hyaluronic acid, and avena sativa, better known as the common oat plant.