The soothing VapoPads vapors with Rosemary and Lavender essential oils are activated by heat and help easy breathing. It is also suitable during cough and cold. , Easy to use: Simply insert scented pad, plug vaporiser into electrical outlet and heat will activate the Rosemary & Lavender vapors in the VapoPad, releasing them into the air. Each scented pad releases soothing vapors for up to 8 hours.