Hydrosols are pure, active and aromatic waters derived from the steam distillation of botanical materials, containing active water-soluble components and a diluted version of the plant’s fragrance. Toners, on the other hand, may contain a wider range of ingredients, including synthetic additives or preservatives, depending on the formulation. While there are many natural and gentle toners available, some toners may be formulated with potentially irritating or drying ingredients.