Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Sleep Number i8 Smart Bed
Purple RestorePlus Hybrid
Comfort
8.8/10
9.2/10
Support
8.9/10
9/10
Cooling
8.5/10
9.5/10
Edge Support
8/10
8.5/10
Motion Isolation
9.5/10
8.1/10
Durability
8.3/10
9/10
Value
7.5/10
8.1/10
Quick Specs Comparison
Spec
Sleep Number i8 Smart Bed
Purple RestorePlus Hybrid
Price (Queen)
$3,099
$2,940
Type
Air Chamber
Hybrid
Firmness
5/10
5/10
Height
11 inches
13 inches
Trial
100 nights
100 nights
Warranty
15 years
10 years
Shipping
In-home delivery
Free shipping; in-home setup and old mattress removal available as a paid add-on
Key Advantages
Why Choose Sleep Number i8 Smart Bed
- Adjustable firmness 0-100
- Dual-zone for couples
- Advanced sleep tracking
Why Choose Purple RestorePlus Hybrid
- 3 inches of GelFlex Grid — enough depth that heavier sleepers and side sleepers do not bottom out
- 3-zone coil unit adds real lumbar reinforcement and shoulder accommodation over the standard Restore
- Same open-lattice cooling as the rest of the range: no foam contacts the body