Side-by-side mattress testing · 144+ comparisons published
Updated September 2026
Category
Sleep Number Climate360
Kluft Beyond Luxury Sublime
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
7/10
8/10
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
Sleep Number Climate360
Kluft Beyond Luxury Sublime
Price (Queen)
$6,999
$8,999
Type
Air Chamber Hybrid
Hand-Tufted Luxury Hybrid
Firmness
5/10
5/10
Height
13 inches
15 inches
Trial
100 nights
Retailer-dependent; Bloomingdale's typically offers returns within 30 days
Warranty
15 years
10-year non-prorated
Shipping
In-home delivery & setup
White-glove delivery through retailers
Key Advantages
Why Choose Sleep Number Climate360
- Active cooling AND heating — 30° range each side
- Most advanced consumer smart bed available
- Ultimate contouring support (13")
Why Choose Kluft Beyond Luxury Sublime
- Plushest feel in the ultra-luxury tier — genuine grand-hotel sink
- Hand-tufted cashmere cover with wool, horsetail and latex comfort layers
- Micro-coil over pocket-coil support keeps the plush surface from bottoming out