This mattress is in total about 7" thick with two 3" natural latex cores encased in a wool and organic cotton damask quilted outer.
This mattress is ideal for those who prefer a supportive feel from their mattress without the pressure points possibility from innersprings. Unlike the regular Harmony, the split has two 3" cores which also allows for a more customized feel.
With the Harmony split, using the Extra Soft as a top layer is not recommened unless this mattress is being used for a guest bed, child, or lighter weight adult(115lbs and below). This is because for most adults, this combination will not properly support the body long term.
If one ever wants to add some softness to this mattress we recommend a natural latex extra soft rubber topper which can be found in our organic bedding section. Additionally, for protection from spills and such, we highly recommend the organic cotton quilted pad be used with this or any of our mattresses. This pad can be found in our organic bedding section also.