Abstract: Novel breathable disposable diapers of per se known configuration comprising a back sheet having a crotch portion and corner portions or wings adapted for engaging the waist and stomach of the wearer, the corner portions being both air-and liquid-permeable, the crotch portion of the back sheet comprising a a liquid-impermeable sheet material carrying an absorbent pad for receiving and retaining body waste materials with the side edges of the sheet material extending around and over the side edges of the pad, whereby to provide a barrier preventing the waste material from escaping through the back of the diaper or through the side edges of the pad.Preferably, a permeable cover or front sheet, is also provided, the absorbent pad in the crotch portion being sandwiched between the cover and liquid-impermeable sheets.