Speaking as a Donald myself, here are the Kilts I have:

Macdonald Modern tank (Hand stitched 8 yard)
Macdonald of Clanranald Tank
Macdonald Modern casual (5 yard polyviscose)
Argyll and Sutherland highlanders military box pleated (8 yards hand sewn in 22ox wool)
Denim modern Kilt for mucky work
Pride of Scotland 5 yard polyviscose
Heritage of Wales 8 yard machine sewn acrylic
5 yard tweed


I wear the acrylic ones and the denim strictly as casual attire, but I would wear any of the others to a formal event.
It's the QUALITY of the Kilt that matters for formal events.