Silk kilts we not all that uncommon before WWII, especially among those Scots who had spent any time in India. Tartan was also woven in India (at that time) as a silk-wool blend, and was very popular for kilts intended for evening wear. As CDNShushi has pointed out the "feel" and the weight of a silk kilt would be a million miles removed from that of a silk shirt. If I had the money...