Approximately 1.8 kilograms of baking soda for cleaning. Shipped in a Ziploc bag, so please refrain from purchasing if you are concerned about the possibility of foreign matter contamination when transferring the product. This is not for consumption or medicinal use. It is baking soda for cleaning. Shipped via post office mailbox. The total weight, including the outer box, will be within 2 kilograms, so the net weight may be less than 1.8 kilograms. Please refrain from purchasing if you are concerned about this. It's a great value, so please do not ask for a discount.