This is my second bottle of this and I really LOVE it! You put it in your fabric softer spot. Downy Rinse & Refresh is a low pH rinse aid that works to remove odors and residues left behind on laundry.These residues if left untreated can build up and lead to odor that can be difficult to remove, even with washing. I have really noticed a difference with this the bottle is HUGE (48oz) LTKGiftGuide LTKHoliday LTKHome