Using a lint brush or the adhesive side of tape will remove dust and dirt on wool hats. If your wool hat gets out of shape, you can use steam from a tea kettle to reshape it. Hold the hat in the steam and allow it to soften. You can then reshape your hat to its original shape and then let it cool down before wearing. Always place a hat upside down on its crown if you do not have a hat rack for storage.
I've been wearing a black beret for about 25 years. There are very practical reasons for this: they are warm, they don't blow off in the wind, and they are a 'classic' style.
Quite honestly, I rarely go through a week when someone I've never met passing by says, "You look great in that beret." When I go to my local grocery store where people know me, if I don't wear my beret they have trouble remembering who I am. So I guess I've found the hat that fits my 'type'.
I teach at a fine and performing arts college. I wear the same clothes every day to class: kaki pants, turtle neck sweater (I have 50 of them, all different colors), sport coat, and BLACK BERET. This is my "uniform". There's only one day every semester that I change my attire: graduation.
When I get one of your berets, I soak it in cold water, then dry it in the sun or the clothes dryer to shrink it down to the 'style' I prefer. It needs to have just the right look.