Febreze ONE CAR Air Freshener gently cleans away odors from your car. Simply attach to your car vent and select the level of intensity to control how much freshness is released. This nature-inspired deodorizer is formulated with no heavy perfumes for pure, light freshness, so you get nothing but fresh. Febreze ONE CAR Air Freshener cleans away odors and slowly releases a light, fresh scent for up to 30 days.* Febreze ONE CAR Air Freshener is the gentle odor-removal solution with a light scent you've been searching for!*On low and under ambient conditions.