Doesn't just mask, fights odors Febreze CAR fights odors and slowly releases a light, fresh scent for up to 30 days* *On low and under ambient conditions Attaches easily to car vent and allows you to select the level of intensity to control how much freshness is released Bring the outdoors inside with the fresh-off-the-clothesline scent of Febreze Linen & Sky We do not use phthalates, formaldehyde or flammable propellants as ingredients when we make Febreze