Transforms natural essential oils into mist (Air Wick Essential Mist contains natural Essential Oils that are automatically transformed into a fine mist). Transforms fragrance infused with natural essential oils into a mist (Air Wick Essential Mist contains natural Essential oils that are automatically transformed into a fine mist). 1 refill lasts up to 45 days (based on lowest intensity setting). Nothing but the ingredients you need. Great fragrance. Contains natural essential oils. What's Inside and What It Does: C13-14 Isoparaffin, C11-13 Isoparaffin, PPG-2 Methyl Ether. Carry the Fragrance. Only use Air Wick. Essential Mist refills in Air Wick essential mist diffusers.