EnviroAir Hypoallergenic Formula is a specially formulated concentrate with essential oils (offering antibacterial properties) designed for use in the Pure Air Revitaliser. It is made from organic plant based ingredients, free of harmful chemicals, pH neutral, ecologically sound and safe to use around your family and pets. Our EnviroAir Hypoallergenic Formula contains six essential oils currently classified by the International Fragrance Association as non-allergenic