Most of our vitenge (plural for kitenge in Swahili) are cotton, some polyester. Our linings are made out of a combination of cotton and polyester which is pre-shrunk in order to limit shrinkage to an absolute minimum. Most of our bags are reinforced with an extra layer, to make them more stiff and make them keep their shape and stand up nicely. All these fabrics are washable at low to medium temperature so your bag will be easy to maintain.