In 1954, Marion Donovan, an American entrepreneur and inventor, transformed infant care with the waterproof diaper cover. Patented in 1951, the diaper cover gained popularity for preventing leaks and eliminating safety pins in diapering. Made from shower curtain material, it initiated the evolution towards modern disposable diapers. Donovan's innovation lightened the parental workload and influenced subsequent advancements in materials and design, shaping the future of baby care products.