An aspect of the present invention relates to a method and system of providing a bed using a plurality of interchangeable adjustable firmness springs to provide localized comfort and support to the user of the bed. The plurality of interchangeable springs may have a plurality of different firmnesses to provide customizable local comfort to a user. The foam springs are color coded based on the firmness associated with the foam spring. The foam springs have markings and/or health devices attached to an end of the foam spring.