In the interests of completeness, and in response to those who have enquired as to where one might obtain their own version of the Duke's most excellent hose, I believe the source of at least some of his hose is Wendy Keith Designs http://www.wendykeithdesigns.co.uk/tradition-c4.html

That company holds a Royal Warrant from the Duke as regards the supply of hose, and several of the posted photos of the Duke appear to feature them. By posting this, I mean no disrespect to Matt Newsome, from whom I have just ordered hose, or the almostunwearoutable outfit, or any others suggested--I'm sure they can all fulfill your requirements. Cheers!