Some of my very first kilts were made from Bull Denim that I got at a fabric clearance house. It was listed as 14oz. but when weighed out (60 in. wide x 36 in long) it weighed 22 oz.
I lasts like iron and those kilts are still in daily use. But it was a royal bear to sew. Putting on a waistband would cost me 10 or 12 needles each. Sewing through 13 to 16 layers required modifying my machines to enable the pressure foot to raise up to over 1/2". Luckily I had industrial machines that were capable of it.
I still have two of those 5 year old kilts. They weigh in at 9 lbs. each. No swish but virtually bullet proof.
The fabric will not wrinkle but it does curl something fierce.
Wish I could find a source for some more of it.