I think in the proper weight, a silk kilt would be a very utilitarian garment.. Silk has been long known for it's insulating properties, while remaining breathable.. I would venture to say it's the wool of the Orient.. Another quality silk has, is it's strength, the Mongols wore silk as an amour, which was perfect for their style of warfare.. I have seen examples of it's durability, by being virtually unpenetratable by arrows..

Today, we think of silk as a high end fashion material, and not the durable utilitarian fabric it was originally intended. I think a silk kilt would be practicle, as long as the cost was not too much over the top.