What's the difference between imitation water-writing cloth and felt?

Imitate Xuan Shui cloth and write on it with a pen dipped in water. It will look like ink when it dries. It can be reused. The calligraphy and painting felt is laid under the writing paper, and the grid below can be seen through the paper to assist in writing positioning. In addition, because the ink will pass through the paper, the excess ink will be absorbed by the painting and calligraphy felt, which plays a role in health and environmental protection.