Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Sonu Sleep System
Serta iSeries Hybrid
Comfort
9.2/10
8.8/10
Support
8.5/10
9/10
Cooling
8/10
8.7/10
Edge Support
7.5/10
9/10
Motion Isolation
8.3/10
8.6/10
Durability
8.8/10
8.9/10
Value
8/10
8.5/10
Quick Specs Comparison
Spec
Sonu Sleep System
Serta iSeries Hybrid
Price (Queen)
$1,349
$1,399
Type
Hybrid
Hybrid
Firmness
5/10
6/10
Height
12"
12 inches
Trial
180 nights
120 nights
Warranty
Lifetime
10 years
Shipping
Free shipping
Free shipping
Key Advantages
Why Choose Sonu Sleep System
- Patented Comfort Channel eliminates shoulder and arm pressure for side sleepers
- Includes custom support pillows designed to work with the mattress
- 180-night trial period gives ample time to adjust
Why Choose Serta iSeries Hybrid
- Trusted 90+ year brand
- Widely available in stores
- Good balance of comfort and support