construction of the fabric than anything you’re doing wrong.
The Main Reason: Denim Is Woven Under Tension
Denim is made from woven yarns, usually with cotton forming the main component.
During manufacturing, those yarns are held under tension as they’re woven together. Once the finished fabric is washed, dried, and exposed to heat and moisture, some of that tension can change.
As the fabric relaxes, different parts of the denim may shrink at slightly different rates.
The result?
The fabric can pull against itself, causing a seam to rotate or