Rest Evercool+ Cooling Pillowcases Review
Rest · Evercool+ Cooling Knit · Soft · Research review — based on manufacturer specifications and our research
Research review
We have not slept on this pillow ourselves yet. Everything below is based on manufacturer specifications and our research — including published materials, dimensions, care instructions, trial and warranty terms — plus how it compares with pillows in the same category. We do not present any of it as first-hand experience.
- Fill
- Evercool+ Cooling Knit
- Warranty
- 1 year
- Last fact checked
- September 2026
Rest's Evercool+ pillowcases are the performance-fabric answer to sleeping hot: a purpose-engineered cooling knit with a lab-measured Qmax of 0.433 W/cm² — a number that puts it among the coolest-touching bedding fabrics tested — validated in a SleepScore Labs study across more than 1,000 nights.
Unlike silk, which cools by wicking and breathability, Evercool works on contact: the yarn itself conducts heat away from your skin fast enough to feel cold. We researched it against the silk options on cooling mechanism, care, and owner feedback.
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Rest Evercool+ is the strongest instant-cooling pillowcase we've researched: a machine-washable, antimicrobial performance knit that feels cold on contact and stays noticeably cooler than cotton all night, at $79 a pair.
How it scored
Specs at a glance
| Fill | Evercool+ Cooling Knit |
|---|---|
| Sizes | Standard (29×19 in), King (35×19 in) |
| Firmness | Soft |
| Adjustable | No |
| Washing | Machine washable. Tumble dry low. |
| Warranty | 1 year |
| Price | $79 |
| Fabric | Evercool+ cooling performance knit |
| Cooling | Qmax 0.433 W/cm² (lab measured) |
| Properties | Antimicrobial, anti-odor, cool-touch |
| Care | Machine washable |
| Colors | Aqua Blue, Arctic White, Cool Gray, Lavender Breeze, Snow Ivory, Midnight Blue |
| Returns | 30-night returns |
How the cooling actually works
Qmax measures how fast a fabric pulls heat from your skin on contact — the higher the number, the colder it feels. Cotton sits around 0.1; Evercool+ measures 0.433 W/cm². That's why the cases feel genuinely cold when your head hits the pillow rather than merely 'breathable.' In SleepScore Labs testing, 97% of hot sleepers found the cooling sensation better than their regular bedding.
The effect is strongest in the first minutes of contact, then the fabric settles to neutral-cool rather than staying cold all night — physics is physics. For night sweats, the wicking and fast heat release matter more than the initial chill anyway.
Feel vs silk
Evercool+ is smooth and stretchy — more like high-end athletic knit than bedding. It glides well, but silk still wins for pure hair-and-skin slip. Where Evercool wins decisively is durability and care: it goes in the washing machine without ceremony, no air-dry-only rules, no delicate cycle anxiety.
Who it's for
This is a night-sweat product first and a luxury product second. Hot sleepers, perimenopause sleepers, and anyone whose pillowcase is damp by morning are the audience — the antimicrobial, anti-odor treatment is aimed squarely at them. Cold sleepers in winter should look elsewhere.
Pros and cons
Pros
- Lab-measured Qmax 0.433 — genuinely cold on contact
- Machine washable with no delicate-care rules
- Antimicrobial and anti-odor
- Validated in a 1,000+ night SleepScore Labs study
- Six colors, Standard and King sizes
Cons
- $79 a pair — premium pricing for pillowcases
- Synthetic knit — not for natural-fiber purists
- Less hair glide than real mulberry silk
- Cool-touch effect is strongest on initial contact
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Who should buy it
Hot sleepers, night sweaters, and perimenopause sleepers who want the strongest instant cooling in a case they can throw in the wash.
Who should skip it
Natural-fiber loyalists (buy silk), cold sleepers, and anyone shopping pillowcases mainly for hair and skin benefits.
How this review was researched
We have not slept on this pillow. This review is based on manufacturer specifications and our research — published materials, dimensions, care instructions, trial and warranty terms, certifications — plus how those specs compare with pillows we know well in the same category. We do not present any of it as first-hand experience.
Comparable pillows
Final verdict
Rest Evercool+ is the most effective cooling pillowcase we've researched — the Qmax number and the SleepScore validation back up what owners report. Silk remains the better beauty fabric, but for pure temperature relief you can wash without thinking about, this is the pick.
Mr. Squish score: 8.9/10
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Frequently asked questions
Sources & verification
- Product specifications: Rest
- Fabric specifications (Qmax 0.433 W/cm²), sizes, and pricing: Rest
- SleepScore Labs validation study: SleepScore Labs study cited by Rest
- Trial and warranty: Rest returns and warranty FAQ
Last fact checked: September 2026