Ours need to be replaced. I'd like to get some good ones with toggle drawcords (no velcro!!!) for the chin. Lightweight and cool/ventilated with a comfortable fabric (no embellishments), crushable/packable, washable. Needs a good-sized brim for sun protection. I prefer the brim vs the neck flap which is a lot hotter.
We currently have the Sun Protection Zone ones from Costco which are great but my complaints are the velcro for the chin straps, and the silly patches on top that supposedly brighten with exposure to UV rays but in reality just start to peel off and look gross after washing. Plus they are getting too small, I bet I could probably get my kids a small adult hat.