This is a nice big bag. The material is like tarp and it makes a bit of noise when it flexes. It does not stay flat so don't try to keep your papers and folders in here! It has a square bottom and is near to the size of a reusable grocery bag. I could easily throw clothes and travel kit in here for a day trip, hence the name. Sturdy construction, I would not have a problem putting heavy things in this bag.