Lasts 30 days. Fragrances that change your world. Air Wick Crystal Air air freshener contains a unique concentrated fragrance gel that releases a pleasant fragrance for 30 days. It's perfect for large rooms. Rain Garden: Capture the unique scent of nature after the rain. An enticing blend of dewy, blue peony combined with lush melons and kiwi. Rejuvenate your home with this cascade of fruits and flowers.