Armor All FRESH fx Smoke X Car Air Freshener Vent Clip in Midnight Air scent features Smoke X patented Odor Elimination Technology. Our vent clip's sleek, low-profile design will fit comfortably in your cars air vent providing an odor destroying fragrance that lasts up to 30 days. Odors are destroyed leaving behind a refreshing Midnight Air fragrance that carries notes of lemon verbena, leather, patchouli and warm woods like a mystic breeze.