Kneipp Active with Arnica Bathroom crystals Beneficial, warming and revitalizing 600g Kneipp Arnica active bath crystals contain a precious arnica extract and natural cabreuva, rosemary and conifer oils. Added to hot water, they offer a beneficial experience by warming and invigorating the body. These are pure salt crystals to which active essential oils have been added. A small amount of bath crystals is enough to perfume the bathroom. Aromathérapie has a beneficial effect not only on the body, but also on the mind. These bath crystals are ideal for normal to oily skin.