Car Vent Clip Air Freshener - Tranquil Skies Scent Armor All You're on the go enough as it is- why not enjoy it? Armor All car air fresheners are developed with advanced Odour Elimination Technology, with a fragrance that lasts up to 30 days while destroying tough odours such as smoke, food and pets. This air freshener features vent clips that easily fasten to car's dashboard vents. Tranquil Skies scent.