Dual Responsive Air Systems
Both Natural Form and Sleep Number use separate air chambers to create a dual-adjustable sleep surface—which means each sleeper can adjust their side of the mattress to their own personal comfort zone. On most models, Sleep Number only has up to 3 zones in each individuals air chamber (per side). Essentially, with less zones you get less support against important pressure points.
On Natural Form mattresses, you get up to 9 to 40 adjustable chambers per side (depending on model). Which allows for ultimate support, pressure relief and a more restful sleep as a result.