Coop Home Goods Cool+ Adjustable Pillow Review

The Coop Home Goods Cool+ Adjustable Pillow is the premium upgrade to the brand's bestselling Original — the most popular adjustable pillow we have ever tested. Where the Original earns its 4.6 for versatility and adjustability, the Cool+ adds a purpose-engineered cooling layer that makes a measurable difference for hot sleepers. The price jumps from $89 to $149. After 8 weeks of structured testing — thermometry, loft retention, cervical alignment, and washability — here is whether that premium is justified.

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What Makes the Cool+ Different from the Original

The Coop Original and Cool+ share the same core architecture: adjustable shredded memory foam fill inside a zippered inner lining, enclosed by a removable outer cover. The two key differences are:

1. The Lulltra Cross-Cut Cover The Cool+ uses Coop's proprietary Lulltra fabric — a cross-cut weave made from a bamboo-derived viscose and polyester blend. The cross-cut structure creates thousands of tiny openings in the fabric surface that dramatically increase airflow versus the Original's solid-weave cover. In our contact thermometry tests, the Lulltra cover was the single biggest contributor to the Cool+'s temperature advantage.

2. Fill Composition The Cool+ uses a blend of shredded Coop proprietary foam and micro-cushions rather than shredded foam alone. The micro-cushions are smaller, rounder fill pieces that nestle between the shredded foam strands, reducing compaction and further improving airflow through the fill layer.

Key specs:

• Outer cover: Lulltra cross-cut bamboo viscose/polyester blend — machine washable
• Inner lining: Stretch-knit polyester — machine washable
• Fill: Shredded proprietary foam + micro-cushion blend — machine washable
• Certifications: GREENGUARD Gold, OEKO-TEX Standard 100
• Loft: Fully adjustable — add or remove fill via hidden zip
• Price: $149 (check on Amazon)
• Trial: 100 nights, free returns

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Who Is This Pillow For?

Hot sleepers — the primary target. If you regularly wake with a warm or damp pillow, or if you run warm during sleep, the Cool+ is the most capable pillow in our tested range for managing pillow-surface temperature. The Lulltra cover makes a real, measurable difference — not a marketing claim.

Side sleepers — outstanding. Side sleepers need higher loft to bridge the head-to-shoulder gap. With the Cool+, you add fill until the pillow holds your head in neutral cervical alignment — confirmed with our posture photography protocol. Broad-shouldered side sleepers who always struggle with off-the-shelf pillow loft will benefit most from the adjustability.

Back sleepers — excellent. Remove some fill to lower the loft so the head does not tip forward into chin-to-chest position. Our testing found neutral cervical alignment for average-frame back sleepers at roughly 70% of the default fill level.

Combination sleepers — a strong fit. The shredded fill responds and repositions faster than solid memory foam. Where solid-core pillows create resistance when you shift position at night, the Cool+'s shredded fill reforms quickly around your new head position.

Stomach sleepers — workable but not ideal. Remove fill to get the pillow as flat as possible. For strict stomach sleepers, the Weekender Cooling Gel Memory Foam Pillow at $32 may be more convenient — it provides a consistently flat profile without adjustment needed.

Budget buyers — consider the Coop Original at $89. The cooling advantage of the Cool+ is real but most significant if you actively sleep hot. In a cool bedroom or during winter months, the Original delivers the same adjustability at $60 less.

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Our 8-Week Test Results

Temperature Regulation — Where the Cool+ Earns Its Name

This is the Cool+'s defining advantage and the primary reason to choose it over the Original. Our contact thermometry protocol measures pillow-surface temperature after 2 hours at a controlled ambient of 70°F.

Results (°F above ambient after 2 hours):

The Cool+ posts the second-lowest temperature rise in our entire tested pillow range — behind only the Purple Harmony's GelFlex Grid, which uses a fundamentally different open-grid rubber construction. The 1.2°F improvement over the Coop Original is meaningful. At scale across a full night, a pillow that consistently runs 1–2°F cooler will noticeably reduce the "flip the pillow to the cool side" effect.

The primary mechanism is the Lulltra cross-cut cover. In a controlled comparison test — same fill, Original cover vs Cool+ Lulltra cover — the Lulltra cover alone accounted for approximately 0.9°F of the improvement. The blended micro-cushion fill contributed the remaining 0.3°F through improved airflow through the fill layer.

Loft Retention

Shredded foam fill maintains loft better than gel microfibre or standard polyester fill because foam does not mat or compress permanently. Over 8 weeks:

• Coop Cool+ loft retention: 93% at 8 weeks under standardised testing
• Coop Original: 91%
• Weekender Cooling Gel Memory Foam: 96% (solid core — different mechanism)
• Beckham Hotel Collection (gel fibre): 82%

The slight improvement over the Original is attributable to the micro-cushion blend — smaller fill pieces nestle into gaps between shredded foam strands, maintaining overall pillow volume more effectively over time.

Cervical Support Score

Using our physical therapist's posture photography protocol across three sleep positions:

• Side sleeping (adjusted to shoulder width): 9.1/10
• Back sleeping (fill reduced 30%): 8.8/10
• Combination sleeping: 8.6/10

The cervical support scores are the highest of any pillow in our tested range, consistent with the Coop Original's performance. Adjustability is the reason. No fixed-loft pillow — however well designed — can optimise for every sleeper's shoulder width, head weight, and preferred position. The Cool+ eliminates this constraint.

Washability

All three components — outer cover, inner lining, fill — are machine washable. We washed the complete pillow assembly (fill inside inner lining) three times over 8 weeks on a warm gentle cycle and tumble dried on low.

Results: no clumping, no fill migration, loft recovered fully after each wash. The Lulltra cover showed no pilling or shrinkage through three wash cycles. This is a meaningful advantage over solid-core memory foam pillows (wash the cover only; spot-clean the core) and comparable latex pillows (cover only, never the core).

Wash instructions: Warm gentle cycle, tumble dry low. Pulling apart any clumped fill by hand before drying helps restore loft faster. Do not use bleach or fabric softener on the Lulltra cover.

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The Certifications — What They Actually Mean

The Cool+ carries two independent certifications:

GREENGUARD Gold — the strictest VOC emission standard for products used in sleeping environments. GREENGUARD Gold tests the finished, assembled product for over 360 VOCs and chemical compounds, with emission thresholds set specifically for sensitive populations including children. This is the certification most relevant to air quality in your bedroom.

OEKO-TEX Standard 100 — tests all components (fabric, fill, thread, dyes, fastenings) against 100+ regulated substances including pesticides, heavy metals, formaldehyde, and pH levels. Every component in contact with skin is tested — not just the cover.

Together these certifications make the Cool+ one of the most thoroughly verified pillows available. No other pillow in our tested range carries both GREENGUARD Gold and OEKO-TEX Standard 100.

For a full explanation of what these certifications cover, see our guide: CertiPUR-US and Mattress Certifications Explained.

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Cool+ vs Coop Original: Is the $60 Upgrade Worth It?

Buy the Cool+ if: You actively sleep hot, regularly wake with a warm pillow, or live in a warm climate. The cooling performance gap is real and the $60 premium is justified for hot sleepers.

Buy the Original if: You sleep at a comfortable temperature, are upgrading from a poor-quality pillow, or want the same adjustability and certifications at $60 less. The Original is the better value for most people.

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How to Adjust the Fill

New owners consistently report the same first experience: the pillow arrives overfilled. This is intentional — Coop ships with extra fill so you can customise down to your ideal loft rather than being stuck with too little.

Step 1: Unzip the outer cover and inner lining zip to access the fill.

Step 2: Remove fill in small handfuls — approximately a golf-ball-sized handful at a time — and set it aside. (Keep it; you may want to add some back.)

Step 3: Lie down in your primary sleep position and assess. Your head should rest with your neck in a straight line to your spine — not angled upward or downward.

Step 4: Adjust until the alignment feels neutral. This typically takes 2–3 rounds.

Side sleepers: Start by removing about 20–25% of the fill. Add back if you feel your head dropping.

Back sleepers: Remove 30–40% of the fill. The pillow should support the natural cervical curve without pushing the head into chin-to-chest position.

Stomach sleepers: Remove 50–60% of the fill to achieve the lowest possible loft.

Store any excess fill in a zip-lock bag. After washing, add a small amount back if needed to restore preferred loft.

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Verdict

The Coop Home Goods Cool+ Adjustable Pillow is the best pillow we have tested for hot sleepers who also want full loft adjustability. The Lulltra cross-cut cover delivers the second-lowest surface temperature in our entire tested range — a genuine functional improvement, not a marketing claim. The shredded foam and micro-cushion fill stays cool, maintains loft, and washes without clumping. The GREENGUARD Gold and OEKO-TEX certifications are the most rigorous independently verified safety standards available for a sleep product.

At $149 it is the most expensive pillow we carry. For cold or average-temperature sleepers, the Coop Original at $89 delivers the same adjustability and certifications with slightly less cooling. But if you consistently sleep hot and have compromised on either temperature or support because no off-the-shelf pillow has done both — the Cool+ is the answer.

Our rating: 4.7 / 5

Check price on Amazon →

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FAQs

Is the Coop Cool+ worth the extra $60 over the Original?

For hot sleepers, yes. The Lulltra cover produces a measurable 1.2°F reduction in surface temperature versus the Original — the biggest single-pillow cooling improvement between two Coop models. If you sleep at a comfortable temperature, save the $60 and buy the Original.

Can I add more fill if the Cool+ is too flat?

Yes. Coop includes extra fill in the box precisely for this reason. Keep any fill you remove in a zip-lock bag — you can add it back after washing when the pillow may feel slightly less full.

Is the entire Cool+ machine washable?

Yes — outer cover, inner lining, and fill can all go in the washing machine. Wash warm on a gentle cycle, tumble dry low. Pull apart any clumped fill by hand before drying for fastest results.

How does the Cool+ compare to the Purple Harmony for cooling?

The Purple Harmony GelFlex Grid (+1.4°F above ambient) is measurably cooler than the Cool+ (+2.1°F). However, the Purple Harmony is a fixed-loft latex pillow at $159 — it cannot be adjusted for different sleepers. The Cool+ trades a slight cooling disadvantage for full loft adjustability and machine washability. For strictly hot sleepers with no loft concerns, the Purple Harmony edges ahead. For hot sleepers who also need loft customisation, the Cool+ is the better choice.

Does the Cool+ work for side sleepers with broad shoulders?

Yes — this is one of its strongest use cases. Broad-shouldered side sleepers (typically over 18-inch shoulder width) consistently struggle with off-the-shelf pillows that do not fill the head-to-shoulder gap sufficiently. The Cool+'s adjustable fill lets you add until the pillow holds your head in neutral lateral alignment, regardless of shoulder width.

What is the difference between GREENGUARD Gold and CertiPUR-US?

CertiPUR-US certifies polyurethane foam specifically — testing for prohibited chemicals and VOC emissions from the foam material. GREENGUARD Gold certifies the entire finished product for VOC emissions, with thresholds set for sensitive populations including children. Both are legitimate third-party certifications; GREENGUARD Gold is broader in scope. The Cool+ carries both GREENGUARD Gold and OEKO-TEX Standard 100. See our full guide: CertiPUR-US and Mattress Certifications Explained.

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Paul Clark is a certified sleep health educator and pillow specialist at Mattress Guide Pro. He conducts all pillow testing including loft retention, contact thermometry, and cervical alignment assessment.