Should You Rotate or Flip Your Mattress?
Almost every modern mattress should be rotated, not flipped. Which beds are the exception, how often to rotate, and when a brand says not to.
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Mattress Slat Spacing & Foundation Requirements
How to measure slat gaps, what maximum spacing warranties require, when you need center support, and which bases void coverage.
Mattress Warranties Explained: What’s Actually Covered?
What a mattress warranty covers, what voids it, how prorated coverage works, and the sag thresholds and foundation requirements brands publish.
Mattress Sagging: What’s Normal and What’s a Defect?
How to measure a body impression the way a warranty claim requires, which depths brands treat as defects, and what sagging is not covered.
What Does “Non-Toxic Mattress” Actually Mean?
“Non-toxic” has no regulated definition in mattresses. Here is what the phrase usually implies, which claims can be verified, and the five questions to ask instead.
Mattress Flame Barriers Explained (Plus Brand Fiberglass Database)
Every US mattress must pass federal flammability tests. Here are the barrier materials brands use, why fiberglass became a problem, and our documented brand-by-brand status.
OEKO-TEX Mattress Certification Explained
OEKO-TEX STANDARD 100 tests textiles for harmful substances by product class, with the strictest limits for baby items. What it covers on a mattress, and what it doesn’t.
GOTS vs GOLS: What’s the Difference?
GOTS certifies organic textiles; GOLS certifies organic latex. What each threshold means, which layers they cover, and why most organic mattresses need both.
GREENGUARD Gold Mattress Certification Explained
GREENGUARD Gold is an indoor-emissions certification with stricter limits than standard GREENGUARD. What it tests, what it ignores, and how to check a certificate.
CertiPUR-US Explained: What It Certifies (and What It Doesn’t)
CertiPUR-US applies to flexible polyurethane foam, not the whole mattress. What the program tests, what falls outside it, and how to verify a certificate.
How Mattress Construction Predicts Durability
Use foam density, comfort-layer thickness, coil design, latex type and warranty terms to judge mattress durability risk—without inventing a lifespan.
Foam-Encased vs Reinforced Coil Edge Support
How mattress edge support is built—foam encasement, higher-gauge perimeter coils, extra coil rows—and how Yawnder tests whether it works.
Types of Mattress Coils Explained
Bonnell, offset, continuous, pocketed and microcoils compared: how each spring type is built, what it changes, and what a coil name cannot tell you.
Mattress Quilting and Comfort Layers Explained
Learn how quilt packages, pillow tops, Euro tops, foam, latex and microcoils shape surface feel—and where early impressions can begin.
Memory Foam vs Polyfoam: The Construction Differences
Memory foam and polyfoam are both polyurethane-based, but response, pressure relief, density and layer role differ. Learn what the labels mean.
Talalay vs Dunlop Latex: What Changes in a Mattress
Compare Talalay and Dunlop latex processing, feel, consistency, weight and the mattress layers where each tends to work best.
Does Mattress Coil Count Matter?
Coil count can describe a support unit, but more is not automatically better. Learn how size, coil type, gauge and zoning change the answer.
Mattress Coil Gauge Explained
A practical guide to 12, 13, 14 and 15-gauge mattress coils, including wire thickness, zoning, edge reinforcement and tradeoffs.
ILD and IFD Explained: How Foam Firmness Is Measured
Learn what mattress ILD and IFD numbers measure, why test conditions matter, and why one foam number cannot predict a whole bed’s feel.
Mattress Foam Density Explained
What 1.5, 1.8, 3, 4 and 5 lb mattress foam means—and why density predicts material use and durability, not firmness.