The Nectar mattress is an all-foam bed that is consisted of 4 layers and totals 11 ″ thick. It begins with a thick base layer of assistance foam. As the name suggests, this layer serves as the structure for the bed. Next is a layer of what the business calls its “Adaptive Hi Core Memory Foam.”Don’t let the fancy name fool you, however– it’s basically just a thick layer of memory foam that basically functions as a shift layer from the assistance foam below.