White AeroFlex Pillow Case

White AeroFlex Pillow Case

Limited Stock
$12.50 $25.00

Stop sleeping on wrinkled, baggy cotton. We engineered the AeroFlex Pillow Case with a proprietary 4-fiber blend that combines the softness of luxury bedding with the fit of high-performance activewear.

Why it feels different:

☁️ The Perfect "Snap" Fit: Thanks to 6% Spandex, this case stretches to custom-mold around the unique curves of your Onyx pillow. No bunching, no wrinkles, just a smooth surface every time.

❄️ Zero-Heat Retention: We blended 24.3% Beechwood Modal with premium Cotton. This combination is 50% more absorbent than cotton alone, pulling sweat away from your skin instantly so the "cool side" of the pillow is every side.

✨ Hotel-Grade Smoothness: The Modal fiber provides a silky, high-end glide that reduces friction on your hair and skin, preventing sleep lines and morning frizz.

The Fabric Specs:

Feel: Silky-smooth, cool-to-the-touch, slight stretch.
Fit: Taut, wrinkle-free, contour-hugging.

Product Details:

Certifications: OEKO-TEX® Standard 100 (Safe from harmful substances)
Care: Machine wash cold, tumble dry low.
Compatibility: Designed exclusively for the Onyx Aeromatrix™ Pillow.

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91% of sleepers say they wake up more refreshed with Onyx
4.6 ★ average rating from 3,500+ reviews
100-Night Sleep Trial — love it or return it
OEKO-TEX® certified cover — safe for sensitive skin
AeroMatrix™ grid: always cool, never flat
100-Night Sleep Trial — love it or return it

What Are Onyx Sleepers Saying..

Learn More

Discover a whole new world of sleep with Onyx—the ultimate pillow for uninterrupted and restorative sleep.

Freckled Hands on Teal Gel Cushion

Discover a whole new world of sleep with Onyx—the ultimate pillow for uninterrupted and restorative sleep.

Adaptive Support
Nontoxic
Durable
Hypoallergenic

How Does Onyx Compares To Others?

Other Pillows
Ergonomically optimized
Airflow Cooling Experience
Pressure Relief Comfort
Durability & Shape Retention
Washable, Clean & Fresh Sleep
100-Night Sleep Guarantee
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AeroMatrix™ Technology

We developed AeroMatrix Technology to completely redefine your pillow experience.

Our proprietary AeroMatrix core is crafted with advanced materials designed to instantly conform to your head and neck, while maintaining a cool, breathable structure that prevents heat buildup.

AeroMatrix ellipse

How Do Our Products Protect You?

We believe that a better pillow isn’t just felt—it’s proven. That’s why every product is backed by our 100-Night Sleep Better Guarantee—a no-stress promise that puts your comfort first.

We want you to feel the difference in real life, not just right out of the box. So take your time. Adjust. Sleep. Rotate. Test it on the nights you need it most.

If after 100 nights you don’t feel measurably more rested, aligned, and supported—simply return it. No pressure. No hidden hoops. Just better sleep, guaranteed.

Try it risk free

Onyx Sleep Sanctuary

01

Breathable Cooling

Keeps you comfortably cool all night—perfect for warm sleepers or hot climates.

02

Engineered Durability

Built to stay supportive and lofted for years, so you don't lose that morning-fresh feel.

03

Adaptive Support

Feels personalized the moment you lay your head down. No more waking up sore or stiff.

Woman Sleeping

Pillowcase Perfection

Tired of mismatched sheets and scratchy fabrics that ruin your vibe? The Onyx White Pillow Case is crafted to pair perfectly with your Onyx Pillow—sleek, breathable, and ultra-soft to the touch. It keeps your sleep surface clean and your bedroom aesthetic sharp.
Made from premium, moisture-wicking fabric, it’s as high-performance as the pillow it wraps. Cool, minimal, and endlessly washable—just like the rest of your nighttime ritual should be. Give your Onyx the case it deserves.

Your Answers to Popular Questions

We do ship to most countries; however, there are a few destinations we are unable to send to. These include: Greenland, Jersey, Isle of Man, Faroe Islands, Canary Islands, Guam, American Samoa, Puerto Rico, Bermuda, Falkland Islands, British Virgin Islands, Cayman Islands, Israel, Russia, South Africa, Argentina, Ecuador, Jamaica, Dominican Republic
Our pillows feature a proprietary cooling surface that helps regulate temperature, ensuring you stay cool and comfortable throughout the night.
Just contact our customer service team by phone or email and we'll make it right!
Grid Material: Remove from the cover and wash in warm water with gentle soap, then let air dry.

Pillow Cover: Machine wash the cover with colors in cold water, tumble dry low.
Our pillows are designed to provide optimal support and comfort for a wide range of sleep preferences. With overwhelmingly positive reviews from customers who have experienced transformative improvements in their sleep quality, we're confident you'll love them too.
With proper care, Onyx pillows are designed to provide long-lasting comfort and support, ensuring you get the most out of your investment.

Discover a whole new world of sleep with Onyx—the ultimate pillow for uninterrupted and restorative sleep.

Shop Now