Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Saatva RX
King Koil FLOWT
Comfort
9.4/10
9/10
Support
9.8/10
8.9/10
Cooling
9.2/10
9.5/10
Edge Support
9.5/10
8.6/10
Motion Isolation
9/10
8.8/10
Durability
9.6/10
8.9/10
Value
8/10
7.8/10
Quick Specs Comparison
Spec
Saatva RX
King Koil FLOWT
Price (Queen)
$2,932
$2,999
Type
Luxury Hybrid
Luxury Hybrid
Firmness
3.5/10
6/10
Height
15 inches
14 inches
Trial
365 nights
120 nights
Warranty
Lifetime
10 years
Shipping
Free white glove delivery
Free white glove delivery on most orders
Key Advantages
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
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