Specification and editorial comparison · lab measurements not available
Updated October 2026
Category
Amerisleep AS4
Casper Dream Hybrid
Comfort
Not lab tested
Not lab tested
Support
Not lab tested
Not lab tested
Cooling
Not lab tested
Not lab tested
Edge Support
Not lab tested
Not lab tested
Motion Isolation
Not lab tested
Not lab tested
Durability
Not lab tested
Not lab tested
Value
8.7/10
8.9/10
Blank cells mean that model has not completed our instrumented lab protocol, so we publish no measured score for it. We never estimate a number we have not recorded.
Quick Specs Comparison
Spec
Amerisleep AS4
Casper Dream Hybrid
Type
Hybrid
Hybrid
Firmness
4/10
5.5/10
Height
12"
12 inches
Shipping
Free shipping
Free shipping & returns
Model specifications are catalog reference details, not instrumented measurements. Confirm the exact configuration and current seller terms.
Key Advantages
Why Choose Amerisleep AS4
- Outstanding pressure relief for side sleepers
- Deep contouring at shoulders and hips eliminates pressure points
- Excellent motion isolation — ideal for couples
Why Choose Casper Dream Hybrid
- True medium feel works for most sleep positions
- Coil unit adds real edge support
- Sleeps cooler than any Casper foam model