The simple difference
Sleep Number® focuses on changing how firm the bed feels. iZone goes further with personalized left-and-right adjustment, targeted comfort zones, cooling materials, and washable covers built for real nightly use.
LUMBAR SUPPORT
Fine-tune the area where many sleepers need support most.
The lumbar area adjusts separately from the head and foot zones.
No separate lumbar air adjustment.
SUPPORT SYSTEM
Air adjustability works with supportive foam, not by itself.
Adjustable air chambers pair with high-density support foam for a more complete feel.
Primarily built around adjustable air firmness.
COMFORT FEEL
Choose the comfort feel that works best for your side.
Reversible comfort foams let sleepers choose a plusher or firmer feel.
No reversible plush/firm comfort foam system.
COOLER SLEEP
Better sleep is also about temperature, not just firmness.
Cooling foams, Ice Lux™ covers, copper-infused fabric, and ventilation help manage heat.
Cooling features depend on the model selected.
MOTION CONTROL
Separate zones help reduce motion from one side to the other.
Individual support zones help limit side-to-side motion transfer.
Air chambers are not separated into the same zone system.
EVERYDAY USE
A mattress should be easier to keep fresh over time.
Covers can be removed and washed or dry cleaned.
Removable washable mattress covers are not a standard feature.
OWNERSHIP VALUE
The total value matters after the mattress arrives.
Free shipping, 100-night sleep trial, and an optional free adjustable base add real value.
Delivery charges, trial period, and base offers that vary.
Need help comparing?
Choosing between smart beds can get confusing fast. Our team can help you compare comfort, support, sizes, bases, and the features that matter most for how you and your partner actually sleep.
8am - 4pm CST, Monday-Friday
No pressure. Just help finding the bed that fits both of you.