Natural Sponge(Cellulose Sponge) Cellulose Sponge Is Mainly Made From Viscose Fiber Wood Pulp. As a Natural Product, the Sponge is Biodegradable. Thanks to its natural fiber structure, it dries quickly and 100% after use, preventing the growth of bacteria and microbes, it is hygienic. Cellulose Sponge completely disappears in nature. With this feature, it is nature friendly. It easily absorbs water. It consists of 95% air bubbles. It is light. Its dry state is 0.04 grams. Thanks to the air bubbles, it absorbs water easily and quickly. The frequency of the air bubbles ensures that each one of them retains water. Thus, it takes 20-30 times more water than its weight. And it can hold/not leak water. Dermatologically Tested. It is Anti-Allergenic.