I live in the tropical climate of South Louisiana, where temps hit the 100's and the humidity is usually above 90%.  My workday attire is dress casual, and these pants look and fit professionally without all the heavy materials.  I'm in and out of my office all day, and these wear comfortably in the heat, and hold up all day long.  Dry cleaning is recommended on the label, but I would not wash them in the house washer, just for the sake of the creased and pressed look that I like.  Having compared and priced several others, Cubavera makes an excellent product, and Amazon sells them for a very reasonable price.
I have received several compliments on the herringbone look: "sharp," "very nice pants," "very dressy," "where did you get those?".