Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Zonli Classic Floor Mattress
Spa Sensations Serenity 8" Memory Foam
Comfort
8.1/10
7.5/10
Support
7.6/10
7/10
Cooling
8.5/10
6.8/10
Edge Support
6.2/10
5.5/10
Motion Isolation
8.7/10
8.5/10
Durability
7.6/10
6.8/10
Value
9.4/10
9.5/10
Quick Specs Comparison
Spec
Zonli Classic Floor Mattress
Spa Sensations Serenity 8" Memory Foam
Price (Queen)
$89
$180
Type
Japanese Floor Futon
Memory Foam
Firmness
6/10
5.5/10
Height
3 inches
8 inches
Trial
30 nights
90 days (Walmart)
Warranty
1 year
10 years
Shipping
Free shipping on orders over $100
Free shipping
Key Advantages
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
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