Tide Odor Rescue In-wash Laundry Booster Pacs help eliminate odors at the source by cleaning deep into the fibers. The Odor Defense technology breaks down built in odors and layers of body soil and dinge, which can lead to odor issues over time. For best results, add Tide Odor Rescue Pacs to your wash along with your favorite Tide PODS laundry detergent pacs. They can be used with regular and HE washing machines, both front- and top-loaders. when washing with Base Tide Liquid detergent