AoYuki Collection – Flex Cube Memory Foam (Refill Foam)

Adaptive Comfort • Breathable Airflow • Skin-Safe Core

The filling that shapes your pillow or bolster — designed to stay cool, responsive, and supportive while allowing air to circulate freely throughout the night.


Pure Memory Foam Cubes | Cooling Gel Infused | Breathable & Non-Clumping | Hypoallergenic & Certified Safe

Sale price$20.90 SGD Regular price$47.90 SGD
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Are You Experiencing Any of These?

Made for people who want real support — but keep waking up sore, sweaty, or restless.

It Feels Lumpy & Uneven

Mixed shredded foam shifts and clumps over time, creating pressure points instead of support.

You Wake Up Hot or Sweaty

Cheap foam and polyester fillers trap heat — especially in humid nights.

The Height Is Never “Just Right”

Fixed-height pillows force your neck into awkward positions — too high or too flat.

It Loses Shape Too Quickly

Low-quality foam breaks down within months, leaving you back where you started.

What Changes When Your Support Is Built Right

Because better comfort isn’t about the pillow brand — it’s about what’s inside.

Clump-Free & Even Support

AoYuki Flex Cubes stay uniform and evenly distributed, preventing clumps and pressure points — unlike mixed shredded foam that shifts and compresses unevenly over time.

Cooling, Breathable & Heat-Regulating

Gel-infused memory foam cubes allow air to flow between each cube, helping heat escape instead of building up — ideal for Singapore’s warm and humid climate.

100% Pure Memory Foam — No Fillers

Made from 100% certified memory foam cubes, with no polyester, cotton, or scrap foam. This ensures consistent support, better durability, and skin-safe long-term use.

Support That Lasts — Not Months

Low-grade mixed foam breaks down quickly. AoYuki Flex Cubes are engineered to rebound and hold structure for years, even with regular adjustment and use.

Engineered to stay even and supportive — no more lumpy or sagging shredded foam.

Adaptive Support That Never Clumps or Sinks

AoYuki Flex Cube Memory Foam moves with you while staying evenly distributed, eliminating the common problems of mixed shredded foam like clumping, pressure points, and mid-night sinking.

Every cube adapts independently to your head, neck, and shoulders for stable support from dusk till dawn.

Designed for Singapore’s warm, humid weather.

Cooling Gel-Infused Cubes for Sweat-Free Nights

Each cube is gel-infused and naturally creates airflow channels that let heat escape quickly.

The result? A pillow that feels fresh, breathable, and comfortable — even for hot sleepers who wake up sweaty using standard shredded foam.

Just premium foam, no polyester scraps or hidden stuffing.

100% Pure Memory Foam — No Fillers, No Shortcuts

Unlike cheap shredded pillows that mix leftover foam, polyester fillers, or fabric scraps, AoYuki uses only clean, high-density memory foam cubes.

This means better durability, safer sleep, and support that stays consistent for years — without flattening, irritating skin, or releasing odors.

See the Difference at a Glance

See how AoYuki Flex Cube compares in material quality, cooling, support, and long-term safety.

AoYuKi Collection
Flex Cube Memory Foam (Refill Foam)
Mixed Shredded Foam
Basic Poly Fill / Fibre Pillow
Material Quality 100% pure, high-density memory foam cubes Off-cut foam mixed with fillers & scraps Hollow polyester fibre
Adjustable Loft ✅ Fully adjustable — add or remove cubes anytime ⚠️ Hard to control, becomes uneven ❌ Fixed loft, not adjustable
Breathability & Cooling Gel-infused cubes with airflow gaps between each piece Dense clumps trap heat Fabric warms quickly, poor airflow
Support & Alignment Adaptive, even support that contours naturally Uneven pressure — firm and soft spots Minimal support, collapses easily
Firmness Control Customisable from soft to firm Inconsistent when adjusted No firmness control
Skin & Health Safety OEKO-TEX®, CertiPUR-US®, GRS certified Usually uncertified Rarely certified
Odour / VOC Level Low-VOC, minimal new-foam smell Chemical smell common May trap odours over time
Durability Over Time High — resists clumping and flattening for years Clumps and gaps form quickly Flattens within months
Comfort Experience Cool, adaptive, pressure-relieving Initially soft, quickly uncomfortable Soft at first, loses shape fast
Eco-Friendliness Uses certified, responsibly sourced materials Mixed, often unknown sources Synthetic, non-eco

Loved By People Like You

Trusted by families across Singapore — from parents refilling kids’ pillows to hot sleepers and users upgrading worn-out cushions.

For Little Sleepers

Gentle, hypoallergenic foam cubes that parents trust for kids’ pillows — soft enough for comfort, supportive enough for healthy sleep.

Everyday Comfort

Perfect for refilling adjustable pillows, bolsters, and cushions — AoYuki Flex Cubes adapt instantly to your preferred height and firmness.

Soft Yet Supportive

Precision-cut memory foam cubes stay evenly distributed — plush enough to hug, supportive enough to hold shape night after night.

What Our Shopee Buyers Say

“I refilled my kid’s pillow with AoYuki foam. It’s soft, cooling, and he sleeps much better now.”
— Shopee Buyer @lyn**
“I’m a hot sleeper and usually wake up sweaty. This foam really helps with airflow even without air-con.”
— Shopee Buyer @kel**
“Didn’t expect such good quality. No chemical smell and doesn’t clump like other shredded foam.”
 — Shopee Buyer @jason**

Personalise your comfort in minutes — no waiting, no guesswork.

Adjust. Test. Sleep Better.

How to Use AoYuki Flex Cubes

1️⃣ Open the zipper of your adjustable pillow or bolster

2️⃣ Add cubes gradually until you reach your ideal height

3️⃣ Shake & spread evenly

4️⃣ Sleep, test, and fine-tune over a few nights

💡 No expansion time required. Ready to use immediately.

➡️ “Sleep, test” subtly encourages use instead of overthinking.

Specifications & Fit

Quick details to help you understand what’s inside and how it’s used.

  • Cube size varies slightly by design (precision-cut for airflow and flexibility)
  • Designed to fit adjustable pillows, bolsters, cushions, and DIY inserts
  • Not a fixed-size product — fully customisable based on usage

💡 AoYuki Flex is a refill material, not a finished pillow.

  • 500g per pack
  • Lightweight enough for easy adjustment, dense enough for stable support

💡 Add or remove cubes to control height, firmness, and feel.

  • Adjustable pillows (neck & head support)
  • Bolsters (hugging, knee, back, pregnancy support)
  • Cushion refills & ergonomic seating
  • Kids’ pillows & sensitive sleepers
  • Users who want control over firmness and loft

Contact our customer service team to initiate a return. We'll provide you with a prepaid shipping label.

  • Medium-firm, adaptive support
  • Even pressure distribution without clumping
  • Adjustable from soft & plush to firmer support

💡 Simply adjust the amount of foam to suit body size, sleep position, or comfort preference.

You may notice some cubes appear light yellow or beige instead of blue.

This is normal and expected.

Why it happens:

  • Memory foam naturally varies in colour depending on batch, airflow exposure, and curing process
  • Cooling gel infusion and production conditions can cause slight shade differences
  • Colour does not affect performance, safety, or durability

✔ Same material
✔ Same density
✔ Same cooling & support performance

💡 Colour variation is a sign of pure memory foam, not fillers or mixed scraps.

Materials, Care & Certifications

Everything that touches your skin — explained simply. Designed for comfort. Tested for safety. Built to last.

CertiPUR-US® Certified Foam

Low-VOC foam, free from harmful chemicals and heavy metals.

OEKO-TEX® Certified Fabric

Tested safe for direct skin contact.

GRS Certified Materials

Made with responsibly sourced, recycled materials.

Materials, Care & Certifications

Everything that touches your skin — explained simply. Designed for comfort. Tested for safety. Built to last.

Outer Cover

Premium organic cotton blend with cooling technology.

Inner Fill

Hypoallergenic memory foam with bamboo fibers.

Washing

Machine wash cold on gentle cycle.

Drying

Tumble dry low or air dry recommended.

Storage

Store in a cool, dry place when not in use.

OEKO-TEX Standard 100 certified, GOTS organic certified, and meets CertiPUR-US standards for foam safety.

Get your pillow or bolster feeling perfect right from the first night. AoYuki Flex Cubes make setup fast, intuitive, and fully adjustable.

Unbox & Adjust in Minutes

✔ Open the rope bag or packaging.
✔ Pour the AoYuki Flex Cubes into your pillow or bolster.
✔ Shake gently to distribute the cubes evenly.
✔ Add more cubes for higher loft or remove for softer feel.
✔ Store extra cubes in the included rope bag for later adjustments.

Materials, Care & Certifications

For detail-lovers: everything inside your AoYuki Flex Cube pillow.

CertiPUR-US® Certified Foam

Foam tested for low VOCs and free from harmful chemicals like mercury, lead, and formaldehyde.

OEKO-TEX® Certified Fabric

Fabric tested and certified safe for direct skin contact.

GRS Certified Materials

Crafted with recycled materials sourced through sustainable, ethical processes.

Materials, Care & Certifications

For detail-lovers: everything inside your AoYuki Flex Cube pillow.

Why AoYuki Flex Cube feels different

AoYuki Flex Cube is crafted as a pure, adjustable refill foam — designed to improve comfort, cooling, and long-term support inside adjustable pillows and bolsters.

  • 100% AoYuki Flex Cube Memory Foam adapts independently to pressure without clumping or collapsing
  • Precision-cut cube structure maintains airflow and even weight distribution
  • Gel-infused memory foam helps dissipate heat in warm, humid climates
  • No cotton stuffing. No polyester fillers. No scrap foam.
  • Designed to restore or customise pillows without introducing uneven pressure points

Tested and trusted for long-term, close contact use

AoYuki Flex Cube uses internationally recognised safety standards:

  • CertiPUR-US®
    Low VOC, free from heavy metals, formaldehyde, and harmful chemicals
  • OEKO-TEX® Standard 100
    Safe for direct and prolonged skin contact
  • GRS (Global Recycled Standard)
    Responsibly sourced and eco-conscious materials

✔ Hypoallergenic

✔ Dust-mite resistant

✔ Safe for kids, adults, seniors, and sensitive skin users

How does it feel?

  • Soft yet supportive — never crumbly or dusty
  • Quiet when moved — no squeaking or rustling
  • Light, springy cubes that rebound quickly after pressure

What style does it suit?

  • Invisible upgrade — designed to work inside pillows and bolsters
  • Ideal for adjustable systems where shape, airflow, and balance matter

Does it match other Shizuku Comfort products?

Yes. AoYuki Flex Cube is designed specifically for:

  • KumoFlex Adjustable Pillow
  • DakiFlex Adjustable Bolster
  • It can also be used for refilling compatible adjustable pillows and cushions.

Is it cooling or warm?

Cooling-focused. The cube structure naturally creates airflow channels, while gel-infused memory foam helps heat escape — ideal for Singapore’s warm nights and air-conditioned rooms.

Does it stay supportive over time?

Yes. AoYuki Flex Cubes rebound individually and resist flattening far better than mixed shredded foam or polyester-filled alternatives.

Will it help with night sweats or tossing?

Many users report:

  • Less heat buildup
  • More even pressure distribution
  • Better neck, head, back, or body alignment depending on use

Foam Filling (AoYuki Flex Cube)

  • ❌ Do not machine wash or soak
  • Spot clean only if necessary
  • Air occasionally in a shaded, well-ventilated area

Colour variation note

Some cubes may appear slightly yellow or beige — this is normal for high-quality memory foam and does not affect performance, safety, or lifespan. It occurs naturally due to foam formulation and oxidation over time.

✨ With proper care, AoYuki Flex Cube maintains structure, support, and airflow for years — not months.

Got Questions? We’ve Got Answers.

Everything You Want to Know About AoYuki Flex Cube

AoYuki Flex Cube is designed for customers who want full control over comfort — so we’ve answered the questions people usually ask before and after buying refill foam. If you need personalised advice, we’re here to help. support@shizukucomfort.com / WhatsApp: +65 8479 5232
Operating Hours
Mon–Sun, 10:30am–4:30pm
Average Reply Time
Usually within 2–4 hours

PRODUCT BASICS

What exactly is AoYuki Flex Cube?

AoYuki Flex Cube is a 100% pure memory foam refill, cut into uniform cubes for adjustable pillows, bolsters, and cushions. It allows you to customise height, firmness, and support — unlike fixed pillows.

Is this the same foam used in KumoFlex and DakiFlex?

Yes. AoYuki Flex Cube is the core filling material used in both KumoFlex Adjustable Pillow and DakiFlex Adjustable Bolster.

How much foam do I get per pack?

Each pack contains 500g of memory foam cubes.

Is 500g enough?

Yes for: Fine-tuning pillow height Refilling worn or flattened pillows Adjusting one side of an adjustable pillow Some users buy multiple packs for full refills or firmer support.

USAGE & SLEEPING POSITION

How do I know how much foam to add?

Start with a small amount, test for 1–2 nights, then adjust gradually. 💡 Less foam = softer & lower | More foam = firmer & higher

Is AoYuki Flex Cube suitable for side sleepers?

Yes. Side sleepers usually add more foam to maintain neck alignment.

What about back or stomach sleepers?

Back sleepers typically prefer medium loft. Stomach sleepers often remove foam for a lower profile.

Can I mix AoYuki Flex Cube with my existing pillow filling?

Yes, but for best performance and durability, we recommend using AoYuki alone rather than mixing with polyester or cotton fillers.

SAFETY & MATERIALS

Is AoYuki Flex Cube safe for kids and babies?

Yes. It is hypoallergenic, dust-mite resistant, and free from harmful chemicals. Always ensure the foam is used inside a secure zippered cover.

Why are some cubes light yellow or beige instead of blue?

This is completely normal. Memory foam can vary in colour due to: Natural oxidation Foam density and formulation Exposure to air and light ⚠️ Colour variation does not affect safety, cooling, or support.

Does it contain polyester fibres or recycled scraps?

No. AoYuki Flex Cube is made from 100% pure memory foam only — no fabric scraps, cotton stuffing, or mystery blends.

COMFORT & PERFORMANCE

Will the foam clump over time?

No. The cube structure prevents clumping and allows even weight distribution.

Does it flatten like cheap shredded foam?

No. Each cube rebounds independently, helping the foam maintain loft and support over years.

Is AoYuki Flex Cube cooling?

Yes. The gel-infused cubes and airflow gaps reduce heat buildup — especially helpful for hot sleepers and humid climates like Singapore.

Will it help with neck or back discomfort?

Many users report improved comfort due to: Better pressure distribution Customisable support height Reduced sinking during sleep (Results vary depending on usage and setup.)

CARE & WASHING

Can I wash the memory foam cubes?

❌ No. Do not machine wash, soak, or tumble dry.

How do I keep the foam fresh?

Spot clean if needed Air occasionally in a shaded, ventilated area Keep away from moisture and direct sunlight

Does the foam have a smell?

A mild foam scent may be present initially and will dissipate naturally within a few days.

DELIVERY & PACKAGING

How is AoYuki Flex Cube packed?

Packed hygienically in a protective bag. ⚠️ It is not vacuum-compressed, so the foam retains its natural loft.

Do I need to wait for expansion?

No waiting required. The foam is ready to use immediately.

How long does delivery take in Singapore?

• Processing time: 1–2 working days after order confirmation • Standard delivery: 3–5 working days after processing • Express delivery: Available with a top-up (subject to availability) • Self-collection: By appointment only (please WhatsApp us in advance)

Do you ship internationally?

We currently support local delivery only. Overseas customers may arrange their own courier, but we are not responsible for third-party shipping damage or loss.

What if I receive the wrong or damaged item?

Take a photo and WhatsApp us — we will arrange an exchange promptly.

Can I return or exchange AoYuki Flex Cube?

For hygiene reasons, opened foam cannot be returned or exchanged, unless: Wrong item sent Manufacturing defect confirmed

Is there a warranty?

Due to the nature of refill foam and hygiene considerations, this product does not come with a warranty.

Can I return or exchange AoYuki Flex Cube?

Due to hygiene reasons, opened foam cannot be returned or exchanged, unless there is a manufacturing defect or wrong item sent.

General Questions

General Questions