Downy Unstopables In-Wash Scent Booster infuses your clothes and fabrics with bespoke freshness befitting a fashionista. Enjoy up to 12 weeks of lasting freshness* by simply shaking Unstopables In-Wash Scent Booster into the washer before your clothes, laundry detergent, and softener. It's the ultra long-lasting luxury of Unstopables. Smell like the lifestyle you deserve. *Freshness out of storage.