Young Brunette Girl Shows Off Wet On The Mattress On The Floor

• 1930s: Innerspring mattresses and upholstered foundations become widely used, and artificial fillers become common. Encased coil spring mattresses, which consist of individual springs sewn into linked fabric bags, are introduced.
• 1940s: Air mattresses constructed of vulcanized rubber-coated fabric are introduced.
• 1960s: The modern waterbed is introduced and gains its first widespread use. Adjustable beds gain popularity.
• 1970s: NASA invents material that later becomes known as memory foam.