Yahoo News

......“The Luma Slumber System comes in two parts, but it’s not like a box spring and mattress. The first part makes up the bulk of the mattress and consists of wrapped coils, an inch of memory foam, and three inches of latex. The thinner second piece is made exclusively of latex, and this “comfort layer” comes in different levels of firmness. Because it’s not as unwieldy as an entire mattress, this layer can be changed out if you get the Luma home and find firm isn’t for you.”