Why Don't Cats Make Noise When Walking?

At night when cats run around in the room, chasing after mice, people cannot hear any footfalls. either can any noise be heard when they jump from heights. Why don't cats make loud footsteps? It is because cats' claws are protected by a thick and soft skin sheath. The sharp, curved claws can be stretched and retracted. When catching mice, cats stretch their claws. But when walking or at rest, they withdraw them. Thus they make no noise, and their claws will not be worn out.