A few months ago I purchased a Briggs and Riley 22 inch carry-on suitcase. It has served its intend use for my 5-15 day domestic trips. However, for short trips 2-3 days in duration I usually throw some items in my backpack or a small duffle bag. When I arrive at the destination my shirt usually becomes wrinkled or I tend to throw too much stuff in the bag.
After studying different luggage options I decided buying a tri-fold compact garment bag was a good idea. I can place 7-10 items of clothing inside the bag and a pair of shoes. This is more than enough capacity for a short 2-3 day trip. From a size perspective, the bag conforms to all domestic carry-on regulations and is a fairly light bag and well constructed bag. One downfall of the compact garment bag is there’s really no place to store dirty clothes except in the front pocket.