3 Triple layer air-through system expels moisture and stuffiness from the insides of the diaper. 40% more breathability even more gentle on the skin. Soft air-in-cushion: 3 times air volume. (* cubic volume average compared with previous Kao's convex part). Softer texture is so gentle to skin even after absorbing a lot of pee. Both side parts are made of multiple fine waves (=convex-concave)! Catch pee & poo and not spread it.