Dear Ray Patel, We are sorry for the confusion. Our product listing clearly states that you are purchasing a vacuum bag. The images of the backpack are for reference only and are intended to show how the vacuum bag can be used during travel. The price difference you mentioned is due to a number of factors, such as product quality, features, and our specific sourcing and business model. Please let me know if you have any additional questions or if you would like to discuss a return or exchange under our return policy. Sincerely, Kris