1.  Dry clean your jeans for the first few months, to lock in the pigment.
2. Or soak your jeans in saline water for one night before the first wash.
3.  To prevent premature fading, don’t wash your jeans too often.
4.  Turn jeans inside out beforehand, both for hand wash and machine wash. Use cold water.
5.  Keep your jeans away from direct sun by drying them indoors and, if you need to iron them, do with warm temperature.