Several diaper brands now use totally chlorine-free (TCF) processing, meaning no chlorine or chlorine-based chemicals touch the materials during manufacturing. Brands currently using TCF methods include Coterie, Kudos, Pura, Eco by Naty, Parasol, Healthy Baby, Terra, EcoPeaCo, Freestyle, Bambo, Abby and Finn, Happy Little Camper, Attitude Living, and Joonya. But the label “chlorine-free” covers two very different manufacturing processes, and understanding the difference helps you make a more informed choice.
TCF vs. ECF: Two Levels of Chlorine-Free
The wood pulp inside disposable diapers needs to be bleached to make it absorbent and sanitary. After the diaper industry moved away from straight chlorine bleaching decades ago, two replacement methods emerged. Elemental Chlorine-Free (ECF) processing uses chlorine dioxide, a milder chlorine compound, as the bleaching agent. Totally Chlorine-Free (TCF) processing skips chlorine compounds entirely and relies on hydrogen peroxide or ozone instead.
Most conventional diapers on store shelves today use ECF processing. That means they don’t use raw chlorine gas, but they do use a chlorine-derived chemical. When a brand advertises itself as “chlorine-free” without specifying further, it could mean either ECF or TCF. The distinction matters if your goal is to avoid all chlorine chemistry in the bleaching process. Look for the specific phrase “Totally Chlorine Free” or “TCF” on the packaging or the brand’s website.
Brands That Use TCF Processing
The following brands use Totally Chlorine-Free pulp, meaning no chlorine or chlorine dioxide is used at any stage of bleaching:
- Coterie
- Kudos
- Pura
- Eco by Naty
- Parasol
- Healthy Baby
- Terra
- EcoPeaCo
- Freestyle
- Bambo
- Abby and Finn
- Happy Little Camper
- Attitude Living
- Joonya
Two brands that previously used TCF processing, Millie Moon and Honest Diapers, have since changed their manufacturing and no longer qualify as Totally Chlorine Free. Brand formulations can shift, so it’s worth checking current packaging or the company website before assuming a product still meets TCF standards.
Why Some Parents Prefer Chlorine-Free
The main concern parents have is about trace chemicals left behind after bleaching. Dioxins, a group of persistent environmental pollutants, were historically linked to chlorine-bleached paper products. Modern ECF and TCF processes both produce no measurable dioxin from the bleaching step itself. However, a re-evaluation of French safety agency data found that dioxin-related compounds still show up in modern diapers at trace levels, likely from background environmental contamination of raw materials rather than the bleaching process. Interestingly, some of those measured concentrations were comparable to or even higher than levels found 30 years ago when elemental chlorine bleaching was still common, suggesting the source isn’t bleaching at all.
Diaper rash is another frequent concern. The most common form, irritant dermatitis, is caused by prolonged moisture, high skin pH from urine mixing with stool, and friction. Allergic contact dermatitis, a less common type, can be triggered by dyes, fragrances, heavy metals, or formaldehyde in diapers. Some of these chemicals enter the product during manufacturing steps like bleaching and bonding. While no clinical study has isolated chlorine-bleached pulp specifically as a rash trigger, choosing diapers with fewer processing chemicals reduces the overall number of potential irritants against your baby’s skin.
How to Verify Claims on the Package
There is currently no universal federal requirement for diapers to list their ingredients or bleaching method. However, New York State has passed legislation requiring every package of diapers sold in the state to carry a clear, printed list of all ingredients with percentages of each component. This kind of transparency is still the exception rather than the rule, which means most parents need to rely on brand websites and voluntary disclosures.
When evaluating a brand, look for specific language. “Chlorine-free” alone is vague and could mean ECF. “Elemental Chlorine-Free” or “ECF” means chlorine dioxide was used. “Totally Chlorine Free” or “TCF” means no chlorine compounds were involved. Some brands also note whether their pulp is FSC-certified, meaning the wood comes from sustainably managed forests, which speaks to environmental sourcing but is separate from the bleaching question.
Performance Differences to Expect
One practical tradeoff with some TCF and “natural” diapers is absorbency. A clinical study comparing two natural diaper brands found that leakage rates varied significantly even within the category. The lower-performing TCF diaper in the study had a urine leakage rate of about 7%, compared to 3% for the other natural diaper that incorporated absorbent core technology similar to conventional diapers. That gap was statistically significant.
This performance difference is common enough that roughly one in three mothers who use natural diapers report switching to a conventional diaper at night for better leak protection. The technology gap is narrowing as newer natural diaper brands invest in better absorbent cores, but it’s worth trying a smaller pack before committing to a full subscription. Absorbency depends on the entire diaper design, not just the bleaching method, so TCF diapers from different brands can perform quite differently from each other.
Cost and Market Trends
Chlorine-free and eco-friendly diapers carry a price premium over conventional options. The broader biodegradable and eco-friendly diaper market was valued at roughly $3 to $4.5 billion in 2024 and is projected to more than double by the early 2030s. Eco-friendly diapers are growing at about 14% annually on Amazon, nearly triple the growth rate of traditional diapers. That rapid growth is bringing more competition into the space, which tends to push prices down over time.
Surveys show that 77% of Gen Z parents and 72% of Millennial parents say they’re willing to pay more for sustainable products, which explains why so many new brands are entering this category. More options generally mean better products and more competitive pricing, so the cost gap between TCF and conventional diapers is likely to shrink in the coming years.