Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
King Koil FLOWT
Saatva RX
Comfort
9/10
9.4/10
Support
8.9/10
9.8/10
Cooling
9.5/10
9.2/10
Edge Support
8.6/10
9.5/10
Motion Isolation
8.8/10
9/10
Durability
8.9/10
9.6/10
Value
7.8/10
8/10
Quick Specs Comparison
Spec
King Koil FLOWT
Saatva RX
Price (Queen)
$2,999
$2,932
Type
Luxury Hybrid
Luxury Hybrid
Firmness
6/10
3.5/10
Height
14 inches
15 inches
Trial
120 nights
365 nights
Warranty
10 years
Lifetime
Shipping
Free white glove delivery on most orders
Free white glove delivery
Key Advantages
Why Choose King Koil FLOWT
- Spiral coil system keeps lateral airflow open — excellent heat dissipation
- Cooling gel comfort layers stay neutral through the night
- Responsive medium feel suits combination sleepers
Why Choose Saatva RX
- Specifically engineered for chronic pain conditions (sciatica, arthritis, scoliosis)
- Patented Lumbar Zone® quilting for targeted spinal alignment
- Rx Wave-Tech® 5-zone pressure relief system