What is a leg twist?
The seam twist that you can get in the legs of your jeans mostly happens to jeans that are made from raw denim or very heavy and dense twill weaves.
Twill fabrics have a diagonal weave. When you wash them they tend to twist in the direction of the weave. Some jeans twist more, others less. It depends on the weight of the fabric, the amount of tension in the weave and how you wash your jeans. This tends to happen more often with our heavier denim fabrics. Typically, these fabrics are woven in Japan or Germany.
We recommend dry cleaning as your best option for these fabrics. Otherwise, you will find that the more often you machine wash your jeans, the more the seams twist around your legs. We consider this to be a part of the character of authentically manufactured vintage jeans and not a quality issue.