This is a handy bag - well designed. I bought two - for myself and a family member. It’s small - which is exactly how it was designed. It’s made for dirty laundry for one person (no dress clothes). When full, it will still fit easily in your standard carry on bag (20”-22” x 14” x 9”).
It also works well for a few groceries or a small gym/beach bag. There is a small outside zipper pocket with a fabric loop in it. You can clip keys to the loop with a carabiner. There is a zipper on the main compartment as well. Can be used as a flight underseat bag as well.