M: I don't know if it has been lowered, but will it become less breathable and clean? <br>A: After lowering it and making it harder, the air permeability will definitely be bad, and the density will definitely become tighter.
M: I don't know if it's lowered, but will it become less breathable and clean?<br>A: It's not good to reduce the breathability after it's harder, and the density is definitely going to be tighter.
M: I don't know if it has been lowered, but will it become less breathable and clean?<br>A: If it is lower and harder, the air permeability will be bad, and the density will be tighter.<br>