HIRO Diapers

HIRO Diapers are the world’s first truly naturally degradable, high-performing diapers — soft on skin, tough on leaks, and powered by plastic-eating Mycelium to return to the Earth.

HIRO's Super Soft Unbleached Diaper

Rating.

500+ 5-Star Reviews

The softest unbleached, high-performing diaper that prevents blowouts, keeps your baby dry, and comes with a tiny pouch of mycelium that help return the diaper to the earth instead of sitting for 400+ years. Welcome to the future of parenting.

$119 $109 with subscription
Why is unbleached better?
Why no blue line?
Way less plastic? Do they still perform?
Is the mycelium in the diaper?
How do they reduce the risk of rash?
Are they totally chlorine free?
Is the Mycelium safe for my baby?
How can Mycelium actually break down plastic?
What are your diapers made of?
Why did you discontinue wipes?

HIRO FAQs

Why is unbleached better?

Unbleached cotton retains its natural waxes and oils, which makes it naturally hydrophobic and ultra-soft against baby’s skin. It skips harsh processing and showcases the true texture of nature—safer for baby, gentler on the planet.

Why no blue line?

We intentionally removed the wetness indicator (aka the blue line) because it contains Bromothymol Blue, a chemical we choose not to include. It was invented to drive consumption, not because parents asked for it. HIRO Diapers are free from this and other unnecessary additives. Read more in The Truth about Diapers.

Way less plastic? Do they still perform?

Yes. HIRO Diapers use less plastic without sacrificing performance. In third-party lab tests, our diapers matched or outperformed leading natural brands in absorbency, dryness, and speed—keeping babies dry for up to 12 hours, day or night.

Is the mycelium in the diaper?

Nope! While foodgrade safe, the SuperHIRO Mycelium only come into play after diaper disposal. You drop a HIRO Pouch into the soiled diaper—never in direct contact with baby—and that’s when the fungi get to work breaking down waste.

How do they reduce the risk of rash?

HIRO Diapers are hypoallergenic, dermatologist-tested, and made with super soft, breathable materials that keep baby’s skin dry and comfortable. They’re free from harsh chemicals, chlorine, bromothymol blue wetness indicator, fragrances, lotions, and dyes—all common irritants that can lead to diaper rash.

Are they totally chlorine free?

Yes. HIRO Diapers go beyond the industry standard and are made with absolutely no chlorine bleaching. Our cotton and pulp are processed using totally chlorine-free (TCF) and oxygen-based methods.

Is the Mycelium safe for my baby?

Yes. The Mycelium used in HIRO Pouches are organic, culinary-grade, non-GMO, and never come into contact with your baby. The pouch stays sealed inside the diaper until it’s discarded, where it activates safely in landfill conditions—not in your nursery.

How can Mycelium actually break down plastic?

Mycelium are nature’s most powerful decomposers. Our proprietary MycoDigestible™ technology uses a blend of shelf-stable Mycelium that activate when exposed to moisture. These Mycelium release enzymes that break down plastic at a molecular level, transforming it into environmentally safe matter—no microplastics, no greenwashing.

What are your diapers made of?

Diaper Ingredients

Absorbent core

  • Softwood fluff pulp from sustainably managed forests
  • Cleaned using a Kraft chlorine-free process
  • Sodium polyacrylate (SAP) for absorbency

Diaper layers & components

  • Backsheet: Natural cotton and polyester with recycled content
  • Topsheet: Polypropylene
  • Acquisition layer: High-loft nonwoven polyester
  • Fastening system: Polypropylene/polyethylene, film, and adhesive

Packaging

  • Made with up to 25% recycled polyethylene

Topsheet (The Layer That Touches Baby’s Skin)

Material

  • 100% polypropylene

What it does

  • A soft, breathable nonwoven that stays dry to the touch

Why it matters

  • Chosen for its gentleness and low risk of irritation
  • Hypoallergenic
  • Dermatologist tested
  • No bleach, no lotions, no fragrances, no dyes

Looking ahead
Today, we use polypropylene because it delivers excellent dryness and skin safety. We’re actively exploring plant-based, unbleached alternatives that maintain performance without relying on chemical softeners or bleach.

Why did you discontinue wipes?

We've decided to discontinue wipes so we can stay focused on what we do best — creating
high-performing diapers that return safely to the Earth. A few reasons drove the decision:

  1. Even "99% water" wipes need preservatives. That last 1% has to keep the wipes
    shelf-stable, which means preservative chemistry we don't believe is ideal for your baby's
    most sensitive skin.
  2. Wipes work against our fungi. Those same preservatives can inhibit the friendly fungi
    that power our MycoDigestibleTM technology — undermining the very thing that makes a
    HIRO diaper biodegrade.
  3. "Biodegradable" wipes aren't really. Even wipes marketed as biodegradable can take
    decades to fully break down, and many never do in the conditions they actually end up in.

Our recommendation: a soft cotton washcloth with warm water at home, and a small
dampened cloth in a wet bag for the diaper bag. We're iterating on a better solution to make
sure all our standards are met.

Size Guide

Size
Weight Ranges
Diapers Per Delivery
NB
<10
186
1
<14
198
2
12-18
180
3
16-28
162
4
22-37
150
5
27+
132

Choose your order type

SAVE 20% + FREE Shipping

Subscription

$109 $136
  • 1 month supply of unbleached diapers (6 packs)
  • 1 month supply of HIRO Pouches that house our friendly Mycelium
  • Ships every 4 weeks
  • Skip or cancel anytime
Save 12.5%

One-Time

$119 $136
  • 1 month supply of unbleached diapers (6 packs)
  • 1 month supply of HIRO Pouches that house our friendly Mycelium
186 Diapers is ~6 changes a day

No Toxic Blue Line
50% Less Plastic
Soft Unbleached Cotton
HIRO Myco-Pod™ Included
What It's Made Of

What’s in our diaper?

  • Unbleached cotton (US-grown, apparel-grade)
  • Unbleached fluff pulp (sustainably harvested softwood forests)
  • Backsheet with recycled polyester
  • Polybag packaging with recycled polyethylene
  • HIRO Myco-Pod™ — one per diaper

What’s never in our diaper?

  • Chlorine bleach — not even "chlorine-free" bleach. Nothing.
  • Bromothymol Blue (chemical dye used in wetness indicator strips)
  • Fragrances or lotions
  • Parabens, latex, or optical brighteners
  • Dyes or prints on the diaper body
  • Excess virgin plastic (50% less than conventional)
Why HIRO
icon.

Soft

  • Apparel-grade Trucotton™ backsheet — cloth-like, not scratchy
  • Naturally hydrophobic cotton wicks wetness away from skin
icon.

Safe

  • Hypoallergenic, dermatologist-tested
  • Unbleached cotton + unbleached fluff pulp — no chemicals
icon.

Clean

  • First and only unbleached diaper on the market
  • No fragrances, lotions, latex, dyes, parabens, or wetness indicators (Bromothymol Blue)
  • Zero chlorine bleaching — ever
icon.

Reduce Waste

  • 50% less virgin plastic than conventional
  • Recycled polyester backsheet
  • FSC-certified fluff pulp from sustainably harvested forests
icon.

Regenerate

  • World's first MycoDigestible™ Diaper ecosystem
  • Organic, non-GMO culinary-grade Mycelium — naturally occurring in North America
  • Delayed activation — Mycelium wake up after disposal, not before
What Comes in the Bundle

Peace of Mind + All-in-One:

The HIRO Journey Subscription Bundle

  • Unbleached Diapers — 6 Packs (132–198 Diapers, size-dependent)
  • Nature's Clean-up Crew — 132–198 Myco-Pod™ Pouches (one per diaper)
Size
NB
1
2
3
4
5
Weight
<10 lbs
<14 lbs
12-18 lbs
16-28 lbs
22-37 lbs
27+ lbs
Diapers
186
198
180
162
150
132
Pouches
186
198
180
162
150
132

Subscription renews automatically — cancel anytime. Diapers per delivery scale with size.

.

Award-Winning.
First of Its Kind.

Loved by parents. Championed by Industry. Nature’s Favorite Diaper.

.

From End to End

Every HIRO diaper comes with a sidekick: the HIRO Pouch, a cozy home for the friendly Mycelium.

From End to End

They stay dormant until your baby adds a little stink. Then? Showtime. Toss the pouch in with the diaper and that’s it.

From End to End

Nature takes it from there, with our vision to break it down. Sustainable. Low-effort. Very magical.

Up to

50%

less plastic than leading brands

(only where performance matters)

5X

drier than leading brands

12hr

High-performance leak protection

3X

faster absorption than eco diapers

Decoration

HIRO vs. Other Diapers

When we set out to create the HIRO Diaper (pronounced ‘hero’), we started by taking everything unnecessary about regular diapers — the excess plastic, the harmful bleach, the toxic blue line — and swapped it for materials that are so soft and gentle yet still high-performing (preventing leaks and blowouts!) on your baby’s bum and beloved by our nature’s clean-up crew. The result? A soft, powerful diaper that actually does what it says: keeps your baby dry and helps the Earth sigh with relief.

Buy HIRO
HIRO logo.
Eco Diaper
Conventional Diaper
No chemical wetness indicator No dye strip on baby's skin
check. None. Ever.
times. Chemical color-change strip
times. Chemical blue dye strip
WHERE IT COMES FROM
Made in North America Supporting local jobs, reducing shipping emissions
check. Made in Canada
times. Made overseas
times. Sometimes overseas
WHERE IT GOES WHEN YOU'RE DONE
Designed to break down Not sit in a landfill for 500 years
check. Breaks down via Mycelium
times. 500+ years in landfill
times. 500+ years in landfill
HIRO Myco-Pod™ Mycelium that help diapers decompose naturally
check. Included free
times. Not available
times. Not available
SUPPORT & SAVINGS
Free diaper-free training Monthly EasyEC Masterclasses
check. Free monthly classes
times. None
times. None
Parent community Real support from HIRO families
check. HIRO Journey community
times. None
times. None
Lower long-term cost EC saves 50%+ on total diaper spend over 3 years
check. Lower with EC savings
times. ~$3,500–$4,500
times. ~$2,500–$3,000
Checked. HIRO wins
Times. Not offered

DON’T Just TAKE IT FROM US

Hear What Real
Parents Have to Say

Rating.

500+ 5-Star Reviews

MELISSA, NY

“I feel so good that this diaper works and my baby’s poop is fertilizing Mycelium to help with the plastic problem! It feels good on every level.”

JOEL + ILANA, TX

“10 out of 10 I choose HIRO Diaper on how it performed on my twins and for how good it makes me feel not to be generating double the waste.”

joshua, CA

“As a master father of four kids,
this diaper is phenomenal — two blowouts and a pee and it worked beautifully. Plus, I feel so much safer for my children’s future.”

Amy, CT

"HIRO diapers is changing the game. My son has not had a diaper rash since using this. So exciting"

Jess, TN

"This has been the absolute game changer for even my mentality for saving the planet and keeping my babies healthy"

Joan, CO

"My two month old has really sensitive skin so what I love about these is its unbleached cotton, they are really soft to the touch. She's happy in them, I'm happy, She loved them"

Wrap your baby in cloth-like, super soft unbleached cotton that feels like cuddly clouds.

HOW IT WORKS

1. Remove the soiled diaper.

We designed the HIRO Diaper to be the least processed for the baby and also for the mycelium to recognize it as food. Unbleached cotton, way less plastic (only where performance counts), NO toxic blue line (aka wetness indicator).

2. Drop in the MycoPod™

There are NO mycelium in the diaper. Instead every HIRO Diaper comes with a sidekick: the HIRO Myco-Pod, a cozy home for our mighty mycelium. Just toss the pouch into the soiled diaper during changing time.

3. Mycelium take it from here.

No special throw-away steps, simply toss into the garbage. When it ends up in a landfill, nature takes it from there, with our vision for the diaper to fully breakdown. Sustainable. Low-effort. Very magical.

FAQs

Why is unbleached better?

Unbleached cotton retains its natural waxes and oils, which makes it naturally hydrophobic and ultra-soft against baby’s skin. It skips harsh processing and showcases the true texture of nature—safer for baby, gentler on the planet.

Why no blue line?

We intentionally removed the wetness indicator (aka the blue line) because it contains Bromothymol Blue, a chemical we choose not to include. It was invented to drive consumption, not because parents asked for it. HIRO Diapers are free from this and other unnecessary additives. Read more in The Truth about Diapers.

Way less plastic? Do they still perform?

Yes. HIRO Diapers use less plastic without sacrificing performance. In third-party lab tests, our diapers matched or outperformed leading natural brands in absorbency, dryness, and speed—keeping babies dry for up to 12 hours, day or night.

Is the mycelium in the diaper?

Nope! While foodgrade safe, the SuperHIRO Mycelium only come into play after diaper disposal. You drop a HIRO Pouch into the soiled diaper—never in direct contact with baby—and that’s when the fungi get to work breaking down waste.

How do they reduce the risk of rash?

HIRO Diapers are hypoallergenic, dermatologist-tested, and made with super soft, breathable materials that keep baby’s skin dry and comfortable. They’re free from harsh chemicals, chlorine, bromothymol blue wetness indicator, fragrances, lotions, and dyes—all common irritants that can lead to diaper rash.

Are they totally chlorine free?

Yes. HIRO Diapers go beyond the industry standard and are made with absolutely no chlorine bleaching. Our cotton and pulp are processed using totally chlorine-free (TCF) and oxygen-based methods.

Is the Mycelium safe for my baby?

Yes. The Mycelium used in HIRO Pouches are organic, culinary-grade, non-GMO, and never come into contact with your baby. The pouch stays sealed inside the diaper until it’s discarded, where it activates safely in landfill conditions—not in your nursery.

How can Mycelium actually break down plastic?

Mycelium are nature’s most powerful decomposers. Our proprietary MycoDigestible™ technology uses a blend of shelf-stable Mycelium that activate when exposed to moisture. These Mycelium release enzymes that break down plastic at a molecular level, transforming it into environmentally safe matter—no microplastics, no greenwashing.

What are your diapers made of?

Diaper Ingredients

Absorbent core

  • Softwood fluff pulp from sustainably managed forests
  • Cleaned using a Kraft chlorine-free process
  • Sodium polyacrylate (SAP) for absorbency

Diaper layers & components

  • Backsheet: Natural cotton and polyester with recycled content
  • Topsheet: Polypropylene
  • Acquisition layer: High-loft nonwoven polyester
  • Fastening system: Polypropylene/polyethylene, film, and adhesive

Packaging

  • Made with up to 25% recycled polyethylene

Topsheet (The Layer That Touches Baby’s Skin)

Material

  • 100% polypropylene

What it does

  • A soft, breathable nonwoven that stays dry to the touch

Why it matters

  • Chosen for its gentleness and low risk of irritation
  • Hypoallergenic
  • Dermatologist tested
  • No bleach, no lotions, no fragrances, no dyes

Looking ahead
Today, we use polypropylene because it delivers excellent dryness and skin safety. We’re actively exploring plant-based, unbleached alternatives that maintain performance without relying on chemical softeners or bleach.

Why did you discontinue wipes?

We've decided to discontinue wipes so we can stay focused on what we do best — creating
high-performing diapers that return safely to the Earth. A few reasons drove the decision:

  1. Even "99% water" wipes need preservatives. That last 1% has to keep the wipes
    shelf-stable, which means preservative chemistry we don't believe is ideal for your baby's
    most sensitive skin.
  2. Wipes work against our fungi. Those same preservatives can inhibit the friendly fungi
    that power our MycoDigestibleTM technology — undermining the very thing that makes a
    HIRO diaper biodegrade.
  3. "Biodegradable" wipes aren't really. Even wipes marketed as biodegradable can take
    decades to fully break down, and many never do in the conditions they actually end up in.

Our recommendation: a soft cotton washcloth with warm water at home, and a small
dampened cloth in a wet bag for the diaper bag. We're iterating on a better solution to make
sure all our standards are met.

  • 5 stars: 44 (88%)
  • 4 stars: 6 (12%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Lora

It is insane how many diapers our baby goes through in a day so it makes us feel like we’re making a difference by using the mushroom pods. We also have had no issues with rashes since the diapers are unbleached.

R
Robyn

Love these. Holds everything in, soft, and better for the environment!? What more could you ask for in a diaper!!!

R
Renee

What I appreciate most about HIRO is that they’re willing to have the hard conversations around waste, parenting, and sustainability with honesty and integrity. So many brands make big environmental claims, but HIRO feels deeply thoughtful in the way they approach innovation, regenerative living and education.

Learning about their mission and the plastic- eating fungi honestly gave me a sense of hope and inspiration. As a mother, I care deeply about the world we’re leaving for our children, and I’m grateful to see a company actively exploring new possibilities instead of accepting the status quo around single-use waste.

I also really appreciate the heart behind the brand, it feels human, curious, community-driven, and rooted in a genuine desire to create meaningful change. Excited to watch HIRO continue to grow and evolve.

M
Monica

I did not do the bundle so idk about the wipes but I tried the 5 pack and it was great. So I ordered a pack of diapers and we enjoy them very much. Great quality. 100% converted from kudos (who switched their design). BE A HIRO TO YOUR FAMILY AND EARTH

B
Bretlyn S.

Absolutely love everything about Hiro diapers! I love that they fit and work great (no leaks or blowouts!). I love that they are made of organic cotton and safe for my little one. And the cherry on top is that they are good for our world! Win, win, win.

D
Drewwilcox

Great product, very absorbent, folds easily and soft on skin.

A
Anonymous

I love these diapers! After two stays in the hospital having to use yucky fragranced and bleached and chemical absorbency chemically-laden brands, we started looking for something better (we are usually cloth diaper people both for the lack of bad chemicals against baby’s skin and for the environmental impact) — we found Hiro and we love them! All the great things we want in a diaper and biodegradable, too! Now we stock them on hand in the car for just in case Heidi gets stuck in another hospital. She’s always tricking the medical types into thinking that she can’t breathe properly, so it’s a big risk for her.

C
CoreyN

I love that hiro is not only more planet friendly than your average diaper but the dryness of the organic materials are superior to the big name synthetic diapers that we have tried. A big pee will still feel dry but you can see that the inside liner of the diaper darkens (not as clear cut as the color changing blue line on other diapers). The customer service is also great and helped sort out diapers shipped to the wrong address.

H
Happy m.

I have zero guilt putting my baby in these. They move with my baby freely. I like the stretchy waste band. I love the credibility of the sourcing. They hold up so well during play time and car rides. No complaints!

M
MegHarper

We started our subscription about a two weeks before baby was born, and have been using it since. I’m not sure what happened, but we had about a two week lapse between deliveries so we found ourselves cycling through all the other diapers (buying small packs to try them out) and have been just disappointed. We cannot wait for the Hiros to be delivered. They’re the best.

W
Whitney

Obsessed with these diapers. Will not go back to anything else. They are soft, absorbent, and the best eco-friendly brand I've tried. Got them for my second-born, and like them so much I got my toddler into them as well. Feels good knowing they are better for the planet :)

S
Stephanie

We were skeptical that these diapers would do a good job, and were expecting a leaky mess like we’ve experience with other eco friendly diapers and these have seriously surprised us in the best way - this may be the best diaper we’ve tried - equal if not better diaper than the speciality brand we switched from, but the non bleached no chemicals construction plus the ability to potentially eliminate the diaper and the plastic around it sends it far into first place. We didn’t know what to think about adding the spores, but ease of adding the pods adds a few seconds to the routine. We’ve started telling friends.

S
StarrMom

As a family thay mostly cloth diapers, these are by far the favorite of the disposables we have tried and I love that they wont sit in a landfall as long as the others.

A
ARay

These diapers are so soft and very roomy. We normally use reusable diapers but love Hiro for on the go and when we NEED to use disposables. We love that they are less plastic and decomposing.

L
Lillian P.

These diapers are soft and gentler on my baby's skin than Kudos/less breakage and leakage, pretty much never fall apart if I change the diaper at least 3x times a day! I love the peace of mind that comes with knowing the plastic will get broken down, as there is no such thing as a plastic free one-use diaper! They do still leak overnight, pretty much always if I don't change right before bed. Overall, probably the best low-plastic one-use diaper on the market!

M
Madison

So soft on babies skin and they haven’t caused any rashes or irritation. They are less absorbent than other brands, but I haven’t had any major blow outs because of it. I really like them so far! Love how easy it is to update and change my subscription, and shipping is pretty fast. Stoked about this company and all it’s doing to reduce waste and solve this huge issue!!

W
Whitney

Obsessed with these diapers! The eco-friendly diapers usually compromise something but these don't. Fit great, don't allow blowouts, absorb well, love em! Feels so good not contributing to landfill :)

A
Anonymous

I’d give it 5 stars if it weren’t for two things: the cost of shipping is wild. I’d rather have some of that baked into the cost of the product than sticker shock at checkout. And I wish the subscription options including more or less diapers and wipes/no wipes.

Otherwise wow these diapers are so soft and hold massive amounts of sh*t (my boy is a big pooper) and it feels good to do right by the planet. We’re also doing EC so I’m really happy to support a high quality product with a company that genuinely cares about doing right.

C
Chelsea L.

We are loving our Hiro diapers. They work just as well as any other diaper we've tried (Honest, Terra, Pampers, etc.) and it feels so much better knowing that these will decompose as much as possible stop contributing to the landfill. I was curious but skeptical and I'm really happy we made the switch. Our daycare is even happy to add the little sachets to her diapers, no problem!

A
Anonymous

LOve it!!

A
Aine

I am SO happy with this product! My baby doesn't get diaper rash, very rarely any blow outs, and the diaper is highly absorbent. Plus I actually feel excitement for the good this diaper is doing for our planet instead of shame when I throw them into the landfill bin. 10/10 recommend Hiro!!!

D
DaddySethG

works exactly as advertised - it's a product I feel good about putting on my baby. Even if it didn't return to the earth in such a short amount of time, It would still be my diaper of choice.

A
Adee C.

These are the softest diapers I have ever used!! I also love feeling like a HIRO each time I put a mushroom packet into the diaper and toss it into the diaper pail. These diapers are the BEST - highly recommend

M
Michael C.

These diapers are every bit as comfortable and absorbent as traditional ones, and we're ecstatic that we finally have a solution to eliminate waste that isn't cloth diapers. My only regret is that HIRO launched after our first two kids were already out of diapers. So grateful to Miki and everyone at HIRO bringing this revolutionary diaper to the market.

A
Anonymous

We LOVE the HIRO diapers. We did not love the wipes, as they are a little difficult to get out of the package. But now that they are being discontinued, I am not sure what we will do. I understand they didn't meet your standards- but the are probably better than 99% of the wipes out there- so now we will have to buy separate wipes that are probably worse for baby and environment. I am not sure how a disposable tushy and cloth will work- logistically

A
Anonymous

These diapers are great: super soft, they hold a lot and seem to absorb quickly, and the fit is nice and long (helpful when somehow poop starts to head right up the back!)

On top of that, customer service is outstanding: I chose the wrong size when ordering and they shipped me the correct size without issue. (website does not make it clear that NB and size 1 are one size…it lists those separately)

I purchased these because my baby was having skin irritation from another cotton-based brand, and his skin already appears to be calming down and healing almost immediately after switching to Hiro.

I don’t know that this whole mushroom pack thing actually works under real-life landfill situations (isn’t the problem that trash in landfills is so impacted it doesn’t breathe and break down? Do these ‘shrooms actually grow under anaerobic conditions?), BUT it’s a phenomenal idea and I am happy to throw my money at meaningful innovation when it comes with a great product.

D
Daron

Wanted to try the trial bundle to see how these diapers fit and held up. Hiro advertising says so much about the eco friendly tech, which I’m all about, but if a diaper doesn’t perform it’s hard to switch. VERY stoked on the performance. We’ve been using coterie and these diapers are on the level. My baby slept all night without needing a change, no leaks. Unfortunately didn’t get him to poop on one. I do wish the starter pack came with 10 instead of 5… i would’ve liked to see how they held up with a big deuce. Anywho, feeling confident enough that I think I’ll cancel my coterie subscription and give these a try. Feels so much better knowing these will break down and not stay trash for the next 400 years!

C
Courtney F.

These are the best diapers, period. I love that they don't compromise on performance or sustainability. No rashes, no leaks, and no guilty conscience!

Add Hiro Diapers to Your Registry

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