High quality and small enough to make it into carry on. I take this on weeklong trips.

This is the best shoe odor remedy and the best way to sanitize the inside of my shoes. I don't like to spray my high end shoes. And I don't like to continuously buy $20 cans of spray and then take 20 min to spray my shoes. The UV based shoe tree kills all the bacteris (-> no odor) and takes 10 seconds to use (put it in, turn on, it turns off by itself).