Most “memory foam squishies” are made of polyurethane (PU) foam, the same family of material as stress balls and mattress toppers. The foam is soft and slow to spring back, which is where the “memory” name comes from. Good ones feel dense and smooth and return to shape over a few seconds. Poor ones smell like chemicals, feel oily or sticky, or crumble. This guide covers what the material is, how squishies are made, how they differ from gel and mochi types, and what to check before you buy for a child, a collector or yourself.
TL;DR
- “Memory foam squishy” is a shopper’s term. The toy is usually slow-rising PU foam, and the quality of that foam matters more than the label.
- Squishies are made by mixing liquid chemicals that react and expand in a mold, then curing, trimming and painting the shape.
- The U.S. Consumer Product Safety Commission (CPSC) warned in August 2026 about counterfeit squishies and about microwaving them. Never heat a squishy.
- Avoid squishies with water beads or liquid fillings for young children, and keep squishies with small parts away from kids under 3.
- Check for a chemical smell, an oily surface and a clear seller before you buy.
Table of Contents
- What memory foam squishies really are
- How squishies are made
- Memory foam squishies compared with other squishy types
- Safety checks before you buy
- A simple test for slow-rise foam
- Our perspective: what a squishy should be
- Choosing a squishy for each kind of buyer
- Shop slow-rise squishies from Archie’s
- Can you make memory foam squishies at home?
- What the Scientific American coverage tells parents
- Quick checklist
- FAQ
- Sources
What memory foam squishies really are
True memory foam is a viscoelastic polyurethane foam. It compresses under pressure and rises slowly. Squishy makers borrow that behavior. Most squishies are not cut from a mattress-grade block, though. They are molded or cut from soft polyurethane foam and given a skin, a print or a painted finish.
Polyurethane is the common thread. A McGill University science article on squishies explains that both stress balls and squishies are made of polyurethane, formed when isocyanates and polyols link into long chains. The same article notes that the exact recipe involves many other ingredients: foaming agents, catalysts, surfactants, dyes and more. That is why two squishies that look identical can feel and smell completely different.
When you see “PU foam squishies” or “slow rising squishies” in a listing, it is generally the same type of toy described in different words. “Slow rising” describes the behavior after you squeeze. “PU foam” describes the material. “Memory foam” is the everyday shorthand for both.
How squishies are made
Exact factory methods vary by maker, but the broad process for foam squishies looks like this:
- Mixing. Liquid components, a polyol blend and an isocyanate, are combined with additives. Water or another blowing agent creates gas bubbles as the mixture reacts.
- Pouring and rising. The mixture goes into a mold shaped like a bun, peach, dice or pineapple. It expands to fill the mold and sets.
- Curing. The foam rests until the reaction is complete and the material is stable.
- Finishing. The piece is trimmed, then painted, printed or given a coated skin. Slower-rising foams usually have a finer, tighter cell structure, which is why they feel smoother and denser.
- Testing and packaging. For toys sold to children in the US, this is where third-party testing and certification should come in. More on that below.
The quality of each step shows in the finished toy. Poorly cured foam can keep a chemical smell. A cheap coating can turn tacky. Uneven mixing makes dead spots that never recover.
Memory foam squishies compared with other squishy types
People searching for memory foam squishies often end up comparing them with other kinds. Here is how the main types differ in feel and in what to watch for.
| Type | Feel | Typical use | What to check |
|---|---|---|---|
| Slow-rise PU foam | Soft, dense, slow rebound | Fidgeting, collecting, gifting | Smell, surface, seller transparency |
| Gel or liquid-filled | Squelchy, stretchy | Sensory squeezing | Leaks, seams, filling type, not for young kids |
| Mochi or stretchy | Doughy, sticky stretch | Pulling and squishing | Lint pickup, filling material |
| Crunchy or textured | Audible crunch and give | Sensory stimulation | Small parts, bead or filler types |
| Water-bead filled | Jelly-like | Avoid for young children | Ingestion and obstruction risk |
The last row is not a style preference. The CPSC has recalled dumpling-style squishies containing water beads because the beads can expand inside a child’s body and cause choking and intestinal obstruction. A second recall of mystery squishy buns found the beads inside expanded larger than the mandatory toy standard permits. The American Academy of Pediatrics’ parenting site explains that water beads look like candy to young children and keep growing once swallowed. If your child is young, solid foam is the simpler choice.
Safety checks before you buy
This is the part that decides whether a squishy is a good gift or a problem. Work through it every time, especially with marketplace listings from sellers you cannot identify.
Know the standard
In the US, toys for children must meet the ASTM F963-23 toy safety specification, which covers material quality, toxicology and small parts for children under 14. It includes provisions for squeeze toys and for expanding materials, which are the categories squishies fall into. A seller who cannot say whether a product is made to meet toy safety rules is a seller to skip.
Smell it and feel it
A strong chemical odor, an oily film or a sticky surface are practical red flags. Cheap imitations often skip the testing that real children’s products need. The CPSC’s August 2026 alert is specifically about fake and counterfeit squishies, so a suspiciously low price on a famous-looking design deserves a second look.
Do not trust “non-toxic” alone
The words “non-toxic” on a listing are a claim, not proof. The CPSC alert and pediatric guidance both point out that a label cannot tell you about hidden hazards such as water beads or non-compliant chemical content. Ask where the toy was tested and who sells it.
Never microwave a squishy
Some social media videos show squishies being heated. The CPSC warns against microwaving squishy toys because they can burst and release hot contents that cause severe burns. If a child in your house wants to try a trend like this, say no and explain why. If a burn happens, get medical care right away and call your pediatrician or local emergency number.
Match the toy to the age
Choose by your child’s developmental stage, not by what is trending. Squishies with small attached parts, liquid fillings or beads are not suitable for children under 3. Our under 3 guide for parents walks through the buying checks in more detail, and our squishy safety guide for kids covers CPSC tips and safer sensory alternatives.
A simple test for slow-rise foam
You do not need a lab to judge a foam squishy. Try this when it arrives:
- Squeeze it firmly for a second or two and let go.
- Watch the rebound. Slow-rise foam should come back steadily, not snap back instantly like a stress ball, and not stay flattened.
- Check for crumbs, cracks or flaking paint on your hands.
- Smell it up close. A faint new-toy scent can fade. A sharp or sweet chemical smell that lingers is a reason to stop using it and contact the seller.
- Pull gently at seams and any attached parts.
We go deeper on this in our slow rising foam guide with the 3 second test.
Our perspective: what a squishy should be
We started Archie’s Squishies because we like squishing, and we think a squishy should do that one job well. Every squishy we sell is described as 100% real and uniquely crafted, and that matters to us because the category is full of lower-quality imitations. Fake squishies are not only a letdown in the hand. They can skip the testing that protects kids.
Here is how we think about the “memory foam” question. The label matters less than three things: a material you can trust, a design that is fun to hold, and a seller who stands behind it. A slow-rise foam squishy is a great fit for stress relief, fidgeting, gifting and collecting, and it suits adults as much as kids. For readers who use squishies as a sensory outlet, including people looking for ADHD-friendly fidgets, a solid foam toy with a steady, quiet squeeze is a calm option. We do not claim any toy treats a condition. If attention or anxiety is a concern, talk with your child’s pediatrician or a licensed professional.
Our advice for any buyer: skip the trend of heating or cutting squishies open, keep water-bead toys away from small children, and buy from a shop that can tell you what it sells.
— Archie
Choosing a squishy for each kind of buyer
For a child aged 4 and up. Pick a single-piece foam shape with no loose parts. Food shapes and dice are easy to hold and fun to trade. Our squishy trading guide covers safe swaps on video and at meetups.
For collectors. Look for distinctive shapes and consistent finish. Our collectible squishy guide lists the CPSC-minded checks we use when picking pieces.
For adults and stress relief. A medium-firm slow-rise squishy works well at a desk. You can read more about what the research says in our sensory squishy benefits article.
For gifts. Choose a design that matches the person’s taste, such as a food shape for a snack lover, and check the age guidance first. Our food squishy guide explains foam, gel and crunch types side by side.
Shop slow-rise squishies from Archie’s
If you are ready to try one, start with our full squishies collection. Popular picks include the Squeezy Peach, the Squeezy Pink Dice and the Squeezy Pineapple. Our line includes slow-rise, crunchy and novelty forms, made for squishing, sensory play, gifting and trading. For help narrowing it down, see our three picks for slow rising squishies.
Can you make memory foam squishies at home?
Many DIY videos show homemade squishies made from sponge, tissue or pourable foam. They are a fun craft, but treat them as craft projects rather than toys for small children. Pourable foam involves chemicals that need adult handling and good ventilation, and homemade pieces are not tested to toy standards. If your child enjoys the idea, our guide to making four viral squishy styles at home is a starting point. Keep homemade pieces away from children under 3 and from pets, and never heat anything to make it softer.
What the Scientific American coverage tells parents
A Scientific American piece from August 2026 notes how common squishies are among school-age children, and asks the question most parents ask: what are they made of, and are they safe? The short answer matches what we have laid out here. The materials vary, so the seller and the testing matter. If you cannot find who makes a toy, you cannot judge it.
Quick checklist
- Solid foam, no water beads, no liquid filling for younger kids
- No strong chemical smell, no oily or sticky skin
- A named seller with clear contact details
- Age guidance you have read, not guessed
- No microwaving, cutting open or heating
- Supervision for children who still mouth objects
FAQ
Are memory foam squishies the same as PU foam squishies?
In everyday shopping, yes. Most squishies called memory foam are slow-rising polyurethane foam. True memory foam is a specific viscoelastic foam, but toy listings use the term loosely to describe a slow rebound.
Are squishies safe for kids?
Solid foam squishies without small parts or fillings are generally the lower-risk option for children old enough to play safely with them. In the US, children’s toys must meet ASTM F963-23. Avoid water beads, avoid microwaving, and keep squishies with small parts away from children under 3.
How can I tell if a squishy is fake?
Look for a strong chemical smell, an oily or sticky surface, a very low price, and a seller you cannot identify. The CPSC has issued a consumer alert about counterfeit squishies, so buy from shops that clearly state what they sell.
Can squishies help with stress or ADHD?
Many people find squeezing a soft toy calming, and we sell squishies for sensory play and stress relief. A squishy is not a treatment, though. If you are worried about attention, anxiety or focus, see your pediatrician or another licensed professional.
Sources
- CPSC consumer safety alert on fake and counterfeit squishy toys
- CPSC recall: GIHNJSI Squeezy Dumplings Toys
- CPSC recall: Rainbow Mystery Squishy Bun Toys
- HealthyChildren.org: Water Beads, Harmful if Swallowed
- ASTM F963-23 toy safety specification
- McGill Office for Science and Society: Squeezing Science out of Squishies
- Scientific American: Squishies are everywhere, but what are they made of?