Looking at it's length, straps and pleating I doubt it is a military-surplus kilt. It's not really military style. I think it may just be the seller's way of calling attention to it, or they are misinformed.

As for being felted vs worsted wool, it could be a case of someone not knowing what one or both of the terms mean, or thinking they are interchangeable. It very well could be felted, but I can't tell from the pics. I'm using a laptop with an 11 inch screen, so they only get so big. But they aren't closeups either, which would help in identifying the material.

As for the tartan, I don't recognize it, but that doesn't mean it's a MacWalmart, just that I'm not familiar with it.

Unless I know for sure what I'm looking at I don't buy from ebay if the seller's description doesn't seem correct or logical, or is too vague. But that's just me. At the price they're asking I don't think I'd chance it unless you contact the seller and get some details, and those details "feel" right.