Side-by-side mattress testing · 144+ comparisons published
Updated September 2026
Category
Cocoon Chill
Novaform ComfortGrande
Comfort
8.5/10
Not lab tested
Support
8.3/10
Not lab tested
Cooling
8.8/10
Not lab tested
Edge Support
8/10
Not lab tested
Motion Isolation
8.7/10
Not lab tested
Durability
8.4/10
Not lab tested
Value
9.2/10
9.5/10
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
Cocoon Chill
Novaform ComfortGrande
Price (Queen)
$619
$449
Type
Memory Foam
Memory Foam
Firmness
5.5/10
5.5/10
Height
10 inches
14 inches
Trial
100 nights
Costco return policy
Warranty
10 years
20 years
Shipping
Free shipping
Free shipping from Costco
Key Advantages
Why Choose Cocoon Chill
- Affordable cooling option
- Backed by Sealy quality
- Phase-change cooling cover
Why Choose Novaform ComfortGrande
- Incredible Costco value
- 14-inch luxury height
- Costco's unlimited return policy