Haeckels Mixology Skin Oil Set Haeckels champions the power of oil – and showcases some of the brand’s best-selling elixirs. Inside, you’ll discover its much-loved kelp bioferment – a gel-like skin-saviour that hydrates dry complexions and scalps – alongside borage seed oil, sea buckthorn oil and raspberry seed oil. All of them are cold-pressed and super-nourishing, thanks to a cocktail of essential vitamins and nutrients.