The proven power of ARM & HAMMER™ Baking Soda is better than ever. Special, lower-sudsing formula rinses cleaner and is designed to work in both standard machines and today’s energy conscious High Efficiency (HE) models. Powers out dirt and odors. Special agents in the detergent trap the soil in the wash water, so it rinses away and doesn't redeposit on your clothes. Perfume & Dye Free.