Thyroid patients canât manage their condition through diet. However, eating the wrong foods or taking the wrong supplements can cause trouble. Advertising Policy Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services.
Ashley-Sleep - Ashley Furniture Industries, Inc. Ashley-Sleep mattresses and foundations are designed and manufactured by Ashley Furniture Industries, Inc. of Arcadia, Wisconsin. Ashley Furniture has been in business since 1945, and they began making their own non-innerspring mattresses in 2008.
In 1871 Heinrich Westfall patented the first innerspring mattress. He saw that coil springs were used in seat cushions and decided to make a mattress from coil springs. Now Leggett & Platt makes about 93% of all the innerspring units used by American mattress manufacturers.