Hydrosols are 100% pure floral or herb waters. It’s the water part after a distillation process. The process to take out of the essential oil from plant material. Hydrosol means “hydro” water and ‘sol’ solution. It is the water solution that contains some of the water-soluble molecules of essential oil as well as water-soluble plant components. These molecules of essential oil give the hydrosol its scent and essential oil therapy and the plant components give the hydrosol its herbal or floral therapy.