What kinds of dirt-proof sleeping bags are available for business trips?

There are generally three types of sleeping bags on the market: cotton sleeping bags, cotton fiber sleeping bags, and colored cotton sleeping bags. Colored cotton ones are the least suitable, very heavy, and take up space in luggage; cotton fiber ones are not as comfortable as pure cotton, and are about the same lightness and thinness, but the advantage is that they are cheaper; the 60-count cotton sleeping bag with the highest overall cost performance should be , this is the lightest and easiest to carry, and it is also very comfortable to sleep on.