Vispronet’s pop up bag and trolley is a great addition to your tradeshow, craft show, or for additional storage. This trolley features an adjustable handle that can be pushed down for convenient storage when not in use. We suggest using the bungee clasps when you are not using the bag. If you are using the bag and decide to use the bungee clasps, it can cause the trolley to become less stable. If you have any questions or concerns about this product, please do not hesitate to contact us.