Sanitary napkin is a kind of absorbent material. The main material is high molecular polymer and high molecular polymer composite paper formed by cotton, non-woven fabric, paper pulp or a composite of the above materials. The side design is mainly used to prevent side leakage , Because it will present a certain angle with the sanitary napkin body when in use, it is easier to rub against the groin area, so sanitary napkins with soft material sides are more favored by women.