Quote Originally Posted by Woodsheal View Post
During the WWI timeframe, I believe they were using 22oz tartan for military kilts.
Yes, I used to have one, a 1917 Seaforth's kilt, very heavy indeed, and extra thick due to the box pleating. The kilt itself is still going strong in a local pipeband, so it was made to last.

I think the switch to 18oz kilts was well after WW2, but at some much later point 18oz material was used in the Scottish regiments up until the formation of the Royal regiment, which seems to use 16oz.
Blame the bean counters.