Every sentence of this ebay ad should make you think.

The first thing - Sorry, there is no such as thing as 16oz Poly-Viscose in a kilt quality fabric. The heaviest weight ever successfully woven, in a recognized Tartan, with the quality to be kilt fabric, are two test runs of 14oz/15oz weight woven by F&K. There are many who will advertise their product as "heavy-weight P/V" and "16oz." but in truth when the kilt arrives and is put on a scale the actual fabric weight is around 7oz-10oz. (using the fabric yard weight standard)

A 5 yard kilt is normally thought of as a casual or light yardage kilt. The standard is 8 yards for a knife pleated kilt.

"Each and every pleat at the back is individually sewn"? Well, all good kilts are done this way too. No surprise there except if all you are used to seeing are ladies skirts.
"Two leather straps"? Again no surprise. Two or three is normal.

These last two items make you wonder what sort of kilt would it be if it did not have these?

Yep, what you have here is a Pub Style Kilt. One that is perfect for going to a bar and spilling beer on.

So if casual to you means that you plan to wear this with a t-shirt and runners. Perhaps to a sporting event or to a bar then it is perfect.

Depending on which of the, at last count, 136 Pakistani companies, is selling this you may get one a bit under in quality, or a bit over in quality, to your Stillwater Thrifty.