There are pros and cons to both cloth and disposable masks. Ultimately, the best mask for a kid is one that fits comfortably and snugly over the nose and mouth. Cloth masks will save you some money and reduce your family's trash output, but you'll have to wash them and they may not offer quite as much protection as a paper mask. Some younger kids may suck on cloth masks, leaving them wet and sticky. If your child does this, go for disposable.