Side-by-side mattress testing · 144+ comparisons published
Updated September 2026
Category
Serta iSeries Hybrid
Engineered Sleep Hybrid
Comfort
8.8/10
Not lab tested
Support
9/10
Not lab tested
Cooling
8.7/10
Not lab tested
Edge Support
9/10
Not lab tested
Motion Isolation
8.6/10
Not lab tested
Durability
8.9/10
Not lab tested
Value
8.5/10
9/10
Blank cells mean that model has not completed our instrumented lab protocol, so we publish no measured score for it. We never estimate a number we have not recorded.
Quick Specs Comparison
Spec
Serta iSeries Hybrid
Engineered Sleep Hybrid
Price (Queen)
$1,399
$1,299
Type
Hybrid
Hybrid
Firmness
6/10
6.5/10
Height
12 inches
12 inches
Trial
120 nights
100 nights
Warranty
10 years
10 years
Shipping
Free shipping
Free shipping in the continental US
Key Advantages
Why Choose Serta iSeries Hybrid
- Trusted 90+ year brand
- Widely available in stores
- Good balance of comfort and support
Why Choose Engineered Sleep Hybrid
- Publishes real foam densities and coil specifications instead of marketing names
- Higher-density comfort foam than typical at this price point
- Neutral medium-firm feel that suits back and combination sleepers