8 high-tech layers food-grade material 1st layer: cotton smooth non-woven (better absorbency which give ultra comfort.) 2nd layer: Woven cloth anion chip (which contains 6100 anion per cubic cm. It works naturally to relieve menstrual discomforts) 3rd layer: Air-laid paper (360 degree tightly wrapped,not easy causes napkins deformities.) 4th layer: Super absorbent polymer (effectively blocks the water more than ten times, keep dry) 5th layer: Professional diversion layer(can accelerate the liquid to proliferate rapidly, is helpful to flicker attracts, prevents the side to leak) 6th layer: air-laid paper(enhance freshness,provides maximum absorbency per sanitary pad) 7th layer: PE breathable leak-proof bottom layer(allows the air to be absorbed in for ventilation) 8th layer: adhesive glue release paper(Specially designed back adhesive which conforms to human ergonomics)