2 bags of 13. 5 pounds of Arm and Hammer Baking Soda. This product works great for many uses but is an especially great value as a pool cleaner. Ideal to use Baking Soda in our Swimming Pool really great to balance the alkanility and PH. ARM & HAMMER Baking Soda now offers a new, larger size for big volume uses like pools, laundry or top-to-bottom "spring" cleaning with a convenient scoop for quick dispensing. The resealable waterproof plastic pouch is perfect for use and storage in high-moisture areas. Best of all, it's easy to take it with you wherever you go, in and outside the house, without messy spills. 13.5 lb. bag Resealable pouch Trusted for over 155 years A natural and gentle cleaner No harsh chemicals Inexpensive Environmentally sensible Safe for baking, cleaning, laundry and pools America's #1 trusted baking soda brand Hundreds of uses The standard of purity Larger size For a fresher cleaner home: For fresher, cleaner clothes - Improves your liquid laundry performance For scratchless cleaning: Scrubs away stains and grease without scratching For Household deodorizing: Absorbs and eliminates odors on contact For sparkling clear pool water: Simple and easy to use Helps reduce eye irritation and burning