What was the major breakthrough in the development of the disposable diapers?

The major breakthrough in the development of disposable diapers was the introduction of superabsorbent polymers (SAP) in the 1960s, which allowed for significant absorption of moisture while keeping the surface dry. This innovation, combined with the use of a plastic outer layer to prevent leaks, made disposable diapers more effective and convenient compared to cloth diapers. The first widely available disposable diaper, Pampers, was launched by Procter & Gamble in 1961, revolutionizing infant care and parenting practices.