Spring Air Company is a mattress company based in the United States. It was founded in Chicago in 1926 when Francis Karr patented a mattress design with free-end coils. Because of the heavy weight, high transportation costs, and low value per unit weight of mattresses, they are often manufactured locally.
Spring Air Company, an American mattress maker based in Chicago, was founded in 1926 by Francis Karr. The unique coil design resulted in local production being more feasible due to the substantial weight and high transportation costs associated with shipping mattresses.