Mattress City is proud to be the Seattle area's home of King Koil!
King Koil isn’t the King of Koils for just their looks. They have taken the innerspring design to a new innovative level with our exclusive Perfect Contour Reaction™ coil system. These encased coil designs not only enhance your sleeping experience but a healthier night’s sleep by providing a proper spinal alignment. All King Koil mattresses are designed and built in the USA since 1898.