I tried one on in Cardiff last week, and the one i had on my head was retailing at £75.
It was well made, but not worth the money, and like most other cleverly marketed items of clothing, it was not good value for money.
Saying that though, they appear to be very popular, but for what your actually getting, their overpriced.
Ive found that my Inov8 Rain peak hat is just as effective for keeping both the sun and rain off your head, at considerable less expense.
I would be far more upset, if a hat i had paid over £70 got blown off my head onto a rock face that only a skilled rock climber could access.
A cheap hat, costing around £12 if lost, is not the end of the world, a very expensive one, however well made, getting blown away, would be unacceptable.
I will never forget the visit to the summit of Pen Y Fan, back in the 1980s, when very expensive Silva expedition sighting compass, new O/S map and case, got blown off its lanyard, towards Cwm Gwdi.
The lanyard stayed around my neck (goodness know how) and it was drawn through two very stout brass circular fasteners sealed into the stout plastic.
That has to be the strongest wind ive ever encountered anywhere in the mountains of Wales.
I never retrieved them, and even all those years ago, a top of the line Silva, was nearly £30, so i recon a hat costing serious money, is an item of kit i can do without.