You should look for either cotton or bamboo fabric burp cloths. Bamboo is a great fabric for burp cloths because it is anti-bacterial, absorbent, and durable.Bamboo is a sustainable resource that grows quickly and without pesticides. It absorbs more liquid than cotton, which is why it makes the perfect fabric for burp cloths. It also doesn't shrink in the wash and resists stains better than cotton or other natural fibers.