In 1947, Marion Donovan introduced the waterproof diaper cover, markedly transforming childcare products. Known as "Boomer," this reusable plastic cover prevented leaks in cloth diapers, thus reducing excessive laundry and effort for parents. Crafted from shower curtains, Donovan's innovation was practical and economical. Her patented design laid the groundwork for the modern diaper industry, greatly impacting the convenience of baby care and securing Donovan's legacy as a pivotal inventor in this field.