Powerful cleaning in cold water settings: Saves energy, doesn't skimp on clean. Conserve energy without skimping on the clean. Save money on your water heating bill with Purex Coldwater Laundry Detergent for an incredible laundry clean for all clothes in cool water. Specifically formulated for a powerful, advanced clean in non-heated water, Purex Coldwater laundry detergent makes it easy to keep your colours clean and your whites bright while using the cold wash setting.