Have you ever shopped here? Checking out tartan fabric.

[Paul Henry]

What is "plain weave?"

Most kilts are made from twill weave, with the recognisable diagonal line on the surface of the cloth, which is often a 2/2 twill ( 2 threads under/2 over), a plain weave is a simple under/over each thread which is how most other fabric is woven.
Twill makes a more durable cloth, but needs 4 heddles rather than 2 , which means it is a little more complex to produce, but not esentially more difficult to make.

[TheOfficialBren]

Oic. Thank you, Paul.