Is the air filter element worth it or the sea surface worth it Why? What material can be used to replace the air filter of motorcycle?

Motorcycle air filter, sponge and paper have their own advantages and disadvantages. From the point of filtration effect, paper has a better filtration effect, but compared with sponge filter element, paper has a short life and can be used once. The filter element of sponge can be cleaned to some extent and reused, but the filtering effect is slightly worse than that of paper. Whether it is paper or sponge, it is a special material, which is different from the paper or sponge we can usually touch. We can't use ordinary paper or sponge as the filter element, which will not only affect the filtering effect, but also cause the change of the concentration of mixed gas, affect the normal work of the engine or damage the engine, so the filter element should be special for motorcycles, so don't lose too much because of small.