Kilt or a tartan.

[Fearnest]

Wearing my Loch Ness Sportkilt today, I received an interesting question...

Here it is, word for word. No changes at all...

"Is that a kilt or a tartan?"

tar·tan (tär'tn)
n.

1. Any of numerous textile patterns consisting of stripes of varying widths and colors crossed at right angles against a solid background, each forming a distinctive design worn by the members of a Scottish clan.

2. A twilled wool fabric or garment having such a pattern.

So by #2, 'tis both.