Specification and editorial comparison · lab measurements not available
Updated October 2026
Category
Saatva HD
Serta iSeries NXG 1500 Hybrid Firm
Comfort
Not lab tested
Not lab tested
Support
Not lab tested
Not lab tested
Cooling
Not lab tested
Not lab tested
Edge Support
Not lab tested
Not lab tested
Motion Isolation
Not lab tested
Not lab tested
Durability
Not lab tested
Not lab tested
Value
8.5/10
8.3/10
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
Saatva HD
Serta iSeries NXG 1500 Hybrid Firm
Type
Luxury Hybrid
Hybrid
Firmness
7.5/10
7.5/10
Height
15.5 inches
Varies by comfort level
Shipping
Free white glove delivery
Free shipping
Model specifications are catalog reference details, not instrumented measurements. Confirm the exact configuration and current seller terms.
Key Advantages
Why Choose Saatva HD
- Designed for 300-500 lb sleepers
- Luxury materials and construction
- Free white glove delivery + old mattress removal
Why Choose Serta iSeries NXG 1500 Hybrid Firm
- Firm, supportive feel that suits back and stomach sleepers
- CoolFeel cover plus carbon fiber foam for heat management
- Q4 zoned coil unit distributes weight evenly