Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Spa Sensations Serenity 8" Memory Foam
Zonli Classic Floor Mattress
Comfort
7.5/10
8.1/10
Support
7/10
7.6/10
Cooling
6.8/10
8.5/10
Edge Support
5.5/10
6.2/10
Motion Isolation
8.5/10
8.7/10
Durability
6.8/10
7.6/10
Value
9.5/10
9.4/10
Quick Specs Comparison
Spec
Spa Sensations Serenity 8" Memory Foam
Zonli Classic Floor Mattress
Price (Queen)
$180
$89
Type
Memory Foam
Japanese Floor Futon
Firmness
5.5/10
6/10
Height
8 inches
3 inches
Trial
90 days (Walmart)
30 nights
Warranty
10 years
1 year
Shipping
Free shipping
Free shipping on orders over $100
Key Advantages
Why Choose Spa Sensations Serenity 8" Memory Foam
- Incredibly affordable — $180 for a queen
- Over 27,000 reviews with 4.4-star average
- Green tea and charcoal infused for freshness
Why Choose Zonli Classic Floor Mattress
- Tufted construction keeps the fill from shifting or clumping
- Softer surface than the Wheat Dream — better for lounging and naps
- 100% cotton shell breathes well and stays cool