In reply to Flinticus: My Dad was outraged, when he bought some Karrimor boots which turned out to be no good, and walking through the Lake District, happened to meet somebody who through chatting turned out to be one of the developers/testers of the boot, who in response to his grumblings said 'Yeah, we never could get it quite right'.
'I paid good money for those boots...'
I've found that doubling up everyday socks can work well in a pinch, and quite cheaply too.
Post edited at 19:55