1. Try dry cleaning.Cotton canvas bag is easy to fade, please do not use bleach or fluorescent detergent.2. If there is no oil and other stubborn stains, please reduce the amount of washing supplies as far as possible.3, please use cold water soak washing, not insolate, suggested dry. Do not wring after washing, let it hang in the shade dry, wet point does not matter, anyway also can dry, you wring become wrinkled.4, leather can be used to wipe cream, avoid folding pressure, so as to avoid deformation.
Attached some backpack for your reference: