Rapha, nice but a bit pricey?

the lightweight cap, any opinions?
I need a xmas pressie for a very bald and sweaty old man who only cycles in a warm and humid climate. He needs a head cover to stop his head from sunburn and cotton caps get saturated pretty quickly.

any alternatives to the rapha one?

I'm both bald and sweaty and really like my Walz: http://www.walzcaps.com/caps_moisturewicking.html