The Cabana Bucket Hat is the most packable hat you'll ever own.  Fold it, crumple it, throw it in your bag, and it will always come back looking new.
 
The Bucket Hat comes in a beautiful blue/grey hue that is both neutral and unique.  Features an adjustable velcro strap inside and a thin wire at the brim of the hat to hold it's shape and allow you to fold the brim up or down.