Have you ever considered using a hat rack or hat stand to display your vintage or other hats? Worried that they will collect dust? Don't be. They are simple to clean and dust. Simply stretch a knee high pantyhose over the end of your vacuum wand and suck that dust off of even the most delicate trim.
You can use traditional hat stands or hat racks (we have our own line of both) or anything that will accommodate the hat. Fat vases or tins. Glass bottles. Anything that appeals to you and works in your space.
So don't keep those lovely treasured hats hidden away. Go hang up those hats!