Let’s talk about “plant-based” for a second. When you spot it on a diaper pack, it’s telling you where some of the materials began their journey, and that’s about it. It doesn’t say which layer they ended up in, how much of the diaper they actually make up, or what the rest of it is made from. A disposable diaper has more than a dozen parts, so that one cheerful little claim could be talking about a single layer or nearly the whole thing, and honestly, you’d never know unless you asked.
So we’re going to ask, layer by layer, together. We’ll walk you through what “plant-based” can and can’t mean for each part of a diaper, how those percentages on the pack get measured, and the questions we think every parent deserves answers to. And then, because it only feels fair, we’ll answer every one of them ourselves for Change Diapers®.
What "plant-based" means on a label
When it comes to diapers, there’s no single legal definition of “plant-based.” Most of the time, brands use it to say that some of their materials came from plants, like cotton, wood pulp, bamboo, or plastics made from plant sugars and starches, such as PLA (PMC review of PLA). The Federal Trade Commission’s Green Guides, which set the ground rules for environmental marketing, don’t have a category for “plant-based” either, so the closest guidance they offer is for “renewable materials,” meaning materials that can grow back, like cotton or wood pulp (16 CFR 260.16; FTC summary of the Green Guides). That’s why you’ll see us talk about “renewable” below.
Before you flip over your next diaper pack, there are two things we’d love for you to keep in mind:
- Plant-based and biodegradable aren’t the same thing. A plastic can have some origins in nature and still be, well, a plastic, because where a material started and what happens to it once your baby’s done with it are two different stories. The Green Guides point out that when a brand simply says “made with renewable materials,” people often assume the product is also recyclable or biodegradable, which may not be true. That’s why the FTC asks brands to name the material and explain why it counts as renewable.
- A percentage is only helpful if you know what it’s measuring. When a pack says something like “60% plant-based,” it’s worth asking 60% of what. Some brands measure by weight, and others use a USDA-recognized lab test called ASTM D6866, which measures how much of a product’s carbon came from recently living plants rather than petroleum (USDA BioPreferred, ASTM D6866). Because plant materials like cotton and wood pulp hold less carbon than many petroleum-based plastics, a diaper’s by-weight number can look quite a bit higher than its by-carbon number, so a weight-only figure doesn’t always tell the whole story. Neither number is wrong, but they aren’t interchangeable, so it’s always okay to ask a brand which one they’re using.
So what does a plant-based claim you can trust look like? According to the Green Guides, unless a product is made entirely from renewable materials (apart from tiny, incidental parts), a brand should give you more than just the phrase. Their example of doing it right names a percentage and explains why the material counts as renewable. We think that’s the standard every plant-based claim should meet, and we’re happy to hold ourselves to it too.
Which layer does "plant-based" describe?
Here's a disposable diaper from the layer against the skin to the parts that hold it together, with what a plant-based claim could mean in each place and what it leaves open. For a full checklist of what every part of a materials list should say, see how to read a diaper materials list.
| Layer | What "plant-based" could mean here | What it doesn't tell you | Ask |
|---|---|---|---|
| Top sheet (against the skin) | A plant fiber such as cotton or bamboo viscose, or a nonwoven made from a plant-derived plastic like PLA | Whether it's a plant fiber or a plastic made from plants; whether the cuffs and ears are the same material | Is the top sheet a plant fiber or a plant-derived plastic? Which other skin-contact parts share it? |
| Layer under the top sheet | A plant-derived film or nonwoven that spreads wetness | Often not mentioned at all | What sits directly under the top sheet? |
| Core: fluff pulp | Wood pulp, which comes from trees in nearly every disposable diaper | How the pulp was whitened, and how much of the "plant-based" figure is simply the pulp most diapers already use | Is the pulp totally chlorine-free (TCF) or elemental chlorine-free (ECF)? |
| Core: superabsorbent polymer | Usually nothing. The standard polymer is sodium polyacrylate, made from acrylic acid derived from petroleum | Whether the plant-based claim reaches the core at all | What is the superabsorbent polymer, and what is it made from? |
| Barrier film and outer cover | A bioplastic film, or a plant fiber outer cover over a film | What share of the film is plant-derived; whether there's still a conventional plastic film under a plant-fiber cover | Is there a film between the core and the outside? What is it made from? |
| Elastics | Rarely plant-based; stretch strands are usually synthetic | Most packs don't name the elastic | What are the leg and waist elastics made from? |
| Adhesives and wetness indicator | Rarely plant-based | How many glue points, what kind of adhesive | What adhesive holds the layers together? |
| Tabs, hooks and landing zone | A PLA nonwoven or film | Often grouped with "other" or left off the list | What are the fastening parts made from? |
The pattern to watch for: the pulp in the core is plant material in almost every disposable diaper, and the superabsorbent polymer right next to it is petroleum-based in almost every one (Nature Communications, 2021). A diaper can call itself plant-based because of its pulp and top sheet while the polymer that does most of the holding is still made from oil.
How to ask a brand which layers
If a pack or product page says "plant-based" and you want to know what it covers, five questions get you most of the way. They work by email, in a comment, or in a chat window.
- Which layers are plant-based? Ask them to name the parts, not the product.
- Which plant, and is it a fiber or a plastic made from plants? Cotton, wood pulp and PLA all come from plants, and they're very different materials.
- What is the superabsorbent polymer made from? This is the question most plant-based claims don't answer.
- If there's a percentage, is it by weight or by carbon? A USDA biobased figure measures carbon. A share by weight tells you how much of the diaper it is.
- What is the rest made from? If a diaper is a certain share plant-based, the remaining share is something else. Ask what.
An unanswered question isn't proof that something is wrong. It's a reason to keep asking before you decide.
The Change diaper, layer by layer
Let’s take a little tour, starting with the layer that sits against your baby’s skin and working our way out to the parts that hold everything together. For each one, we’ll share what a plant-based claim could mean there, and what it might leave unanswered. And if you’d like a full checklist of what every part of a materials list should tell you, we’ve put one together in How to Read a Diaper Materials List.
| Component | What it is made from | Where the material comes from |
|---|---|---|
| Top sheet | 100% cotton, chlorine-free | Cotton, a plant fiber |
| Acquisition layer | PLA perforated film | PLA, a polymer made from plant starch, not oil |
| Fluff pulp | Totally chlorine-free (TCF) cellulose fluff pulp | Wood |
| Super Absorbent core | The world's first and only biodegradable Super Absorbent core made from polysaccharide, not fossil fuel. | Not made from fossil fuel |
| Core wrap | PLA nonwoven | Plant starch |
| Leg cuffs | 100% cotton, chlorine-free | Cotton, a plant fiber |
| Waistband | PLA nonwoven | Plant starch |
| Elastics | Spandex | We don't count it as plant-based |
| Barrier film | MATER-BI bioplastic film | Bioplastic; its plant-derived share is being confirmed |
| Outer cover | 100% cotton, chlorine-free | Cotton, a plant fiber |
| Wetness indicator | pH-sensitive adhesive | We don't count it as plant-based |
| Front and back ears | 100% cotton | Cotton, a plant fiber |
| Fastening tab and hook | PLA nonwoven tab, PLA film hook | Plant starch |
| Landing zone | PLA nonwoven | Plant starch |
| Adhesives | Formaldehyde-free hot-melt adhesive | We don't count it as plant-based |
So what’s actually inside a Change diaper? By weight, it’s about a third cotton, about half absorbent core, about a tenth PLA, a few percent bioplastic film, and about 2% elastics and adhesives. We’ll be adding numeric ranges for each of these once they’re confirmed, and our full Materials page lists every component with its share as those numbers come in.
So here’s where Change lands. Our cotton, pulp, and PLA parts all come from plants, and our Super Absorbent core is made from polysaccharide, a long chain of sugars, rather than fossil fuels. In fact, a certified third-party lab has independently tested it and confirmed that it biodegrades. The elastics, adhesives, and wetness indicator are the parts we don’t count as plant-based, and since our barrier film is a bioplastic, we’ll share exactly how much of it comes from plants as soon as that number is confirmed.
Source: Change materials list, component and material columns, September 15, 2026. Group shares are rounded words; ranges to come.
Why the core matters most
If you only ask one question, we’d suggest asking about the superabsorbent polymer. It’s the part that holds most of the wetness, and it’s also the part a plant-based claim most often leaves out. In a conventional diaper, it’s sodium polyacrylate, those tiny dry beads that swell into a gel when they get wet, made from acrylic acid that comes from petroleum. Ours does the very same job, pulling wetness in and away from your baby’s skin, and it’s the world’s first and only biodegradable Super Absorbent core. You can read more about it in What the Beads Inside a Diaper Are.
What "made with biodegradable components" means for us
Plant-based and biodegradable are two different claims, so we always keep them separate. A Change diaper is made with biodegradable components, and our Super Absorbent core has been independently tested by a certified third-party lab and confirmed to biodegrade. We will be adding the lab summary right here on our site, so you can see it for yourself.
Curious how it feels in your hands? You can see sizes and buying options, or visit our FAQ for answers about fit and subscriptions. And if there’s a layer you’d love to know more about, just ask us, and we’ll walk you through it straight from our materials list.
Last updated October 15, 2026. Materials are from the Change materials list of September 15, 2026.