Here's an idea for Pleater.

A RK in denim with sewn edge pleats. But here's the twist, the pleats are rolled military box pleats with the edge turned back. I guess the turned back part should be sewn at both edges so there is a double row of stitches on each pleat kind of like the double row of stitches on parts of jeans.

It would be so thick, that it would be like denim armor.