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.

The sanitary napkin is divided into three layers, namely the surface layer, the absorbent core, and the bottom layer. The back glue of the sanitary napkin is an impermeable material, which can keep the menstrual blood in the sanitary napkin, and is used to absorb the menstrual blood flowing out of the vagina when a woman's menstrual cramps occur. Women's resistance during menstruation is very poor, and failure to pay attention to care will cause various improprieties in the body.