The fiber composition of coral velvet is delicate and soft, which makes it feel more comfortable. In contrast, crystal velvet is not as smooth and skin-friendly as coral velvet because of its roughness. Coral velvet has high density and thick cilia, which can effectively lock body temperature and keep warm. It is very suitable for wearing in cold weather. Crystal velvet is fine and the number of filaments is very small, which can not provide the same excellent or lasting and reliable insulation effect.