While reading "The Book" last night and admiring the outstanding pictures, it dawned on me that onone in the pictures was wearing a hat or protection from the sun. The reason this is of interest to me is I've had Basal Cell Carcinoma (skin cancer) on my head, face and shoulders over the years. Based on strong advice from my skin doctors and plastic surgeons, I never go out of doors without a hat. I'm of Irish desent, fair skin and blue eye, which makes me a prime candidate for skin cancer, but everyone should protect themselves from the distructive rays of the sun on our skin. I have not seen or read about wearing hats in this forum or in fact anywhere in any magazines about hiking land navigation. Do you guys and girls wear hats when hiking or is it not a major concern?