Changelog
- Updated Dec 18, 2025: Early access published.
- Updated Dec 10, 2025: Our testers have started testing this product.
- Updated Nov 07, 2025: The product has arrived in our lab, and our testers will start evaluating it soon.
- Updated Oct 29, 2025: We've purchased the product and are waiting for it to arrive in our lab.
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Boring
Lifting the Covers On Mattress Performance
We've recently started testing mattresses. We use objective data and repeatable testing for key characteristics like firmness, cooling, and motion isolation, to ensure each mattress gets the same treatment. Since we buy all of our mattresses, we can tear them down layer by layer and isolate the mechanical properties of every component: quilted tops, foams, coils, and any special materials. Our approach gives us unprecedented insight into how each product design decision contributes to a mattress's overall performance and feel, and allows us to tailor our results to different body types and sleeping positions.
Test Results
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Design
Performance
Firmness
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Normalized Stiffness @ Head/Feet
Normalized Stiffness @ Lumbar
Firmness Level
Support
Indent Difference @ 50 kg (110 lb)
Indent Difference @ 80 kg (172 lb)
Indent Difference @ 110 kg (242 lb)
Motion Isolation
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Peak Acceleration @ Head/Feet
Dissipation Time @ Head/Feet
Peak Acceleration @ Lumbar
Dissipation Time @ Lumbar
Edge Support
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Naturalistic Loading Pad Indentation
Small Platen Indentation @ 0 mm From Edge
Small Platen Indentation @ 150 mm From Edge
Increased Indentation @ Mattress Edge
Components
Foam Layer Material
Foam Layer Mass Density
Quilted Top Fill
Quilted Top Fill Foam Density vs. Reference
Upper Comfort Foam @ Head/Feet
Upper Comfort Foam @ Head/Feet Density vs. Reference
Upper Comfort Foam @ Lumbar
Upper Comfort Foam @ Lumbar Density vs. Reference
Lower Comfort Foam @ Head/Feet
Lower Comfort Foam @ Head/Feet Density vs. Reference
Lower Comfort Foam @ Lumbar
Lower Comfort Foam @ Lumbar Density vs. Reference
Transition Foam
Transition Foam Density vs. Reference
Support Foam
Support Foam Density vs Reference
Foam Layer Thickness
Spring Layer Dimensions
Foam Layer Firmness
Quilted Top Fill 25% IPD
Upper Comfort Foam @ Head/Feet 25% IPD
Upper Comfort Foam @ Lumbar 25% IPD
Lower Comfort Foam @ Head/Feet 25% IPD
Lower Comfort Foam @ Lumbar 25% IPD
Transition Foam 25% IPD
Support Foam 25% IPD
Spring Layer Firmness
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Normalized Comfort Layer Stiffness @ Head/Feet
Normalized Comfort Layer Stiffness @ Lumbar
Normalized Support Layer Stiffness @ Head/Feet
Normalized Support Layer Stiffness @ Lumbar
Foam Layer Resilience
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Quilted Top Fill
Upper Comfort Foam @ Head/Feet
Upper Comfort Foam @ Lumbar
Lower Comfort Foam @ Head/Feet
Lower Comfort Foam @ Lumbar
Transition Foam
Support Foam
Spring Layer Bounciness
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Comfort Spring Layer Maximum Rebound Height
Support Spring Layer Maximum Rebound Height











