The principle is clear and easy “wear as much as possible, wash as little as possible”. The more you wear your jeans, the better they will look.
Following this principle and washing your jeans after 6-8 months of wear should already show some nice fadings and strong character.
Wash the jeans inside out with mild soap and in cold temperature (maximum 40ºC). No bleach, chlorine, or other chemicals.
Do not use tumble dryer, hang dry instead.