Your Sun baby diapers has big elastic waistband and tridimensional leak guard, so it is not only super absorbent, no leakage, but also not tight. We use high quality absorbent material so you don't worry about lumps and leaks. In this way, mothers don't have to change diapers for their babies frequently at night. What's more, the surface is covered with tiny pores that is breathable. So even if baby sweat, baby's butt wont turn red in hot summer. I believe that mothers who have used it will never change diapers again!