Specification and editorial comparison · lab measurements not available
Updated October 2026
Category
Sleep Number ComfortNext Lux
Vispring Devonshire
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
Not lab tested
Not lab tested
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
Sleep Number ComfortNext Lux
Vispring Devonshire
Type
Air Chamber Hybrid
Handcrafted Pocket Spring & Natural Fill
Firmness
5/10
6/10
Height
13 inches
8.3 inches
Shipping
In-home delivery
White-glove delivery through authorized retailers
Model specifications are catalog reference details, not instrumented measurements. Confirm the exact configuration and current seller terms.
Key Advantages
Why Choose Sleep Number ComfortNext Lux
- Superior pressure relief for all major pain points
- 67% more cooling materials than ComfortMode
- Superior airflow engineering
Why Choose Vispring Devonshire
- Hand-nested calico pocket springs — the original pocket-spring maker since 1901
- British fleece wool comfort layers breathe and regulate temperature naturally