Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Cocoon Chill
Lull Original
Comfort
8.5/10
8.6/10
Support
8.3/10
8.4/10
Cooling
8.8/10
8.3/10
Edge Support
8/10
8/10
Motion Isolation
8.7/10
8.8/10
Durability
8.4/10
8.4/10
Value
9.2/10
9/10
Quick Specs Comparison
Spec
Cocoon Chill
Lull Original
Price (Queen)
$619
$649
Type
Memory Foam
Memory Foam
Firmness
5.5/10
6/10
Height
10 inches
10 inches
Trial
100 nights
100 nights
Warranty
10 years
10 years
Shipping
Free shipping
Free shipping
Key Advantages
Why Choose Cocoon Chill
- Affordable cooling option
- Backed by Sealy quality
- Phase-change cooling cover
Why Choose Lull Original
- Simple, effective design
- Affordable price point
- Good motion isolation
Lab Verdict
Cooling was a wash — both mattresses landed within half a degree of each other after 60 minutes of body heat. Motion isolation was roughly equivalent; either is safe for a partnered sleeper. Pressure mapping put both beds well under the 32 mmHg capillary-closure threshold for side sleepers. Perimeter compression was nearly identical — neither bed is the obvious pick on edge support alone. Responsiveness was comparable; repositioning effort should feel similar on either.
| Metric | Cocoon Chill | Lull Original | Edge |
|---|---|---|---|
| Cooling (60-min Δ°F) | 3.3°F | 3.6°F | Cocoon Chill |
| Motion isolation (g) | 0.1g | 0.11g | Tie |
| Edge sinkage | 2.2" | 2.3" | Cocoon Chill |
| Shoulder pressure (mmHg) | 32 mmHg | 33 mmHg | Cocoon Chill |
| Response time (s) | 1.3s | 1.3s | Tie |
| Off-gassing | 2 days | 2 days | Tie |
Median of 3 trials, 68°F climate-controlled lab. DH/KW / NL/KW · scoring vv2.1.