Most sanitary napkin often comprises of three main layers: surface, absorption and the bottom. It is necessary to consider the materials and functions of each part.

The first layer should be pure cotton mesh based surface. It should be able to absorb quickly, prevent moisture trapping and deter back flow of blood fluid. The permeable absorption layer should consists of crystalloid gel to freeze and condense, thereby locking in the blood fluid,

And most importantly, the bottom layer should be made of skin-like pores permeable material to ensure easy & smooth releases of water molecule clusters, thus expelling moisture and effectively reducing humidity to keep the skin fresh and clean.