The sponge microneedle, also known as the sponge needle, looks soft. It is extracted from freshwater sponge. This is a bone-bearing animal. Due to the particularity of its growing environment, it has gradually evolved its special bones. It is a siliceous bone needle that is very small and has a slender needle shape but has a strong hardness. This bone needle consists of hard proteins and isoproteins and cannot be dissolved in any organic solution, so it can be used as a very good cosmetic natural material.