SIJO FlexCool Memory Foam Pillow Review
SIJO · Shredded memory foam and microfiber blend, cooling knit cover · Medium · 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
- Shredded memory foam and microfiber blend (adjustable)
- Trial
- 30 nights (per SIJO's product page)
- Last fact checked
- September 2026
SIJO built its reputation on cooling bedding, and the FlexCool is its take on the adjustable shredded-foam pillow: a memory foam and microfiber blend you can add or remove, under a cover engineered to feel cool on contact.
At about $80 with a 30-night trial, it undercuts Coop's cooling models while keeping the adjustability that makes this category useful.
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A well-priced adjustable shredded-foam pillow with a genuinely cool-touch cover; a strong value in the cooling-adjustable category.
Research score
Specs at a glance
| Fill | Shredded memory foam and microfiber blend (adjustable) |
|---|---|
| Cover | Cool-to-the-touch knit cover |
| Sizes | Standard/Queen, King |
| Firmness | Medium |
| Adjustable | Yes |
| Trial | 30 nights (per SIJO's product page) |
| Price | $80 |
| Adjustability | Add or remove fill |
The cooling cover
SIJO's cover fabric is the differentiator: it uses high thermal-conductivity fibers that feel cool on first touch. That initial coolness fades as the fabric reaches skin temperature — true of every cool-touch cover — but owner reports consistently rate it among the better-feeling covers in this price band.
Adjustment approach
The foam-and-microfiber blend mimics Coop's formula: foam pieces supply support while microfiber softens the lumps. Remove fill for back sleeping, keep it full for side sleeping.
Who it suits
Hot sleepers who want adjustable loft without paying Coop Cool+ or Tempur-Breeze prices. It is one of the cheapest ways to get both adjustability and a cool-touch cover in one pillow.
Pros and cons
Pros
- Cool-touch cover at a mid-range price
- Genuinely adjustable fill
- 30-night trial
- Foam-and-microfiber blend softens shredded-foam feel
Cons
- Cool-touch effect is strongest at first contact
- Less brand track record than Coop or Tempur-Pedic
- Shredded fill needs occasional re-fluffing
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Who should buy it
Hot sleepers wanting adjustable loft and a cool-touch cover under $100.
Who should skip it
Fans of solid foam or down feels.
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
The FlexCool punches above its price: adjustable, cool-touch, and trial-backed. One of the better values in cooling pillows.
Mr. Squish score: 8.1/10
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Frequently asked questions
Keep reading
Sources & verification
- Product specifications: SIJO
- Trial and warranty: SIJO FlexCool 30-night trial terms
Last fact checked: September 2026