This is another important question for our Purple mattress review. Purple mattresses consist of separate layers made either of memory foam or what the company describes as a “hyper-elastic” polymer. This flexible polymer is the material of the outer sleeping layer, the Smart Comfort Grid, which provides the combination of softness and support described earlier.
In the original Purple mattress, the outer layer consists of about 2.5 centimeters of polymer grid. Beneath the grid is a layer of very dense polyurethane foam, measuring about 9 centimeters. This layer serves to stabilize the grid and provide an ideal sleeping experience.
The final layer, at the base, consists of about 10 centimeters of medium-firm high-density polyurethane foam. This layer gives the bed the structural support it needs to keep you comfortable. All of the layers converge together inside a polyester-lycra knit fabric cover.
The All-New Purple mattress is put together differently, though it also starts with the polymer Smart Comfort Grid. Customers can choose how thick to make that outer layer, selecting from layers of 5, 7, or 10 centimeters.
Underneath the outer polymer layer sits a set of support coils — much the same as you might find in a traditional bed. The coils lay between two smaller sheets of foam. The polyester-lycra knit fabric remains the same.
A fun but interesting fact to note from our Purple mattress review: You should expect more softness, not more firmness, from the thicker Smart Comfort Grid layer.