Pillow Lab Glossary.
Plain reference sheet with review links beside the claims.
Plain reference sheet with review links beside the claims.
Pillow Lab Glossary
This is the decoder ring for the odd numbers on PillowReviewGuy. The numbers are calculated scoring rows until retail rows replace them.
Terms
| Term | Meaning | Where to use it |
|---|---|---|
| PFI | Pillow Fit Index. Alignment, heat, wash loss, recovery, and comfort blended into one score. | Fast scan of the lab row. |
| LDI | Load Deflection Index. How much height survives compression with support credit. | Side support and broad-shoulder checks. |
| TRI | Thermal Retention Index. Lower is better for hot sleepers. | Cooling page and heat-test page. |
| WDI | Wash Durability Index. Higher means less wash trouble in the model. | Washable and guest-room pages. |
| Loaded loft | Pillow height under a ten-pound board after five minutes. | Loft chart and every review page. |
| Fit band | Narrow side, average side, broad side, and stomach model scores. | Deciding who the pillow fits. |
| CI95 | Approximate 95 percent confidence interval for repeated model loft readings. | Repeatability and sample drift. |
| Older-owner weight | Longer-use owner notes get extra attention because flattening takes time. | Remodeling scores after review research. |
Reference Pages
FAQ
| Question | Answer |
|---|---|
| What is PFI? | PFI is the Pillow Fit Index, a single scoring row that blends alignment, heat, wash loss, recovery, and comfort. |
| What is TRI? | TRI is the thermal-retention index. Lower values are better for hot sleepers. |
| Are these lab numbers final? | The current rows are calculated scoring worksheets. They show the math path and should be replaced when retail units are measured. |
| Why link so many product pages? | A pillow claim is useful only when it points to the exact pillow page, specs, caveats, and money link. |
| Which review should I read first? | Start with the pillow that matches your sleep position and mattress firmness, then compare it against a cheaper control pillow. |
Other Guides
This Gets Expensive
Guide pages improve when the linked review rows become measured retail rows.
Current bill: fixtures, duplicate pillows, heat probes, wash cycles, and storage tubs.
Donations buy the next retail pillow, the duplicate lab pillow, and the boring supplies that make the data useful.