• NAIA Ironbark Tea Tree Natural Antifungal Bar with tea tree leaves and herbal ingredients, highlighting its natural antifungal properties.
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  • NAIA Ironbark Relief & Clear Bar on a white background, showcasing its smooth, natural wooden appearance and compact size.
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  • NAIA Ironbark Tea Tree Antifungal Bar showing the soap with natural ingredients for fungal infection relief and skin balance.
1 10
4.9/5  ·  2,245+ verified customers

IronBark Tea Tree Antifungal Bar

The daily shower bar that breaks the fungal biofilm first — so recurring fungus finally clears and stays clear, anywhere it shows up.

  • Clears recurring fungus at the source
  • Stops itching & burning within days
  • Rebuilds the skin barrier, doesn't strip it
  • 60 seconds a day, in the shower you already take

What are you dealing with? (same bar works on all of them)

Jock itch: the crease is the most fungus-friendly spot on the body. Wash daily, focus the lather on the fold, and let it sit 60 seconds before rinsing.

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60-Day Money-Back Guarantee
Biofilm-Disrupting Formula
Dermatologist Tested

Fewer than 2% of customers ever use the guarantee.

Within about 72 hours, skin fungus builds a biofilm — a protective shield documented in published research for over two decades. Creams, sprays and powders sit on top of it, which is why things clear for a week and come back. IronBark breaks the biofilm first with 2% tea tree oil (about 4× the typical concentration), then clears what's underneath — and because it's a wash, it covers everywhere the fungus has spread in one shower.
Actives: Tea Tree Essential Oil 2%, Coconut Oil Extract 5.38%, Sulfur Spring Extract 1.34%, Witch Hazel 1.34%, Ceramide 0.8%.
  • Tea tree — breaks the biofilm, disrupts the fungal cell membrane
  • Sulfur spring extract — gently exfoliates and deep-cleans
  • Witch hazel — strips the moisture fungus needs, calms irritation
  • Ceramide + coconut oil — rebuild the skin barrier instead of stripping it
No steroids, no synthetic fragrance, no dyes. Plant-based, cruelty-free.
Once or twice a day in the shower: lather for 15 seconds, wash the affected area (and everywhere nearby) for 60 seconds, rinse, and dry the area thoroughly — moisture is what restarts the cycle. Most people feel the itch ease within days; visible clearing typically comes over 2–3 weeks. After clearing, 2–3 washes a week keeps it away.
One bar for the whole family of skin fungus: jock itch, athlete's foot, body ringworm, under-boob and skin-fold irritation, tinea versicolor, fungal acne — plus the musty odor that comes with fungal overgrowth. It's the same organism showing up in different places, which is why one wash covers all of it.
Fungal biofilms were first characterized in peer-reviewed research in the early 2000s (Costa-Orlandi et al.), and they're the accepted explanation for why topical antifungals under-perform against recurring infections: the treatment never reaches the colony. Tea tree oil is one of the few natural compounds shown to penetrate fungal biofilm, which is the core of IronBark's formula — concentrated at 2%, roughly 4× a typical tea tree soap. Made in an FDA-registered facility.
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IronBark bundle

Flare season is here.
We sell out when it hits.

Heat, sweat, and closed shoes wake the cycle back up every year. Stock the shower before it starts — the Buy 2 Get 1 Free bundle goes first.

Claim Buy 2, Get 1 Free

Skin Fungus Doesn't
Leave On Its Own

IronBark is the daily wash that breaks the cycle instead of pausing it.

~25%
of people worldwide are dealing with a fungal skin infection at any given time — most treat only the surface1
70%
recurrence reported for athlete's foot treated with typical topical creams — because the biofilm underneath survives2
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IronBark in the shower

FROM OUR POST-PURCHASE SURVEY

What Happens When The Biofilm Breaks

89%
reported the itching stopped within the first week
84%
saw visible skin clearing within 21 days
87%
reported no recurring symptoms with continued daily use
92%
replaced creams and sprays with IronBark as their only antifungal

Based on a survey of 1,000+ customers after 30 days of daily use. Individual results vary.

Try It Risk-Free For 60 Days
★★★★★4.9 stars

Join 2,245+ Others Who Broke The Cycle

★★★★★

Two years of creams. Three weeks of this bar. Done.

Same spot, both sides, every summer since 2024. The biofilm explanation was the first thing that ever made sense of why it kept coming back. Wash, done, no extra step. It's been months.

Greg P.

★★★★★

Bought it for my husband without telling him.

Put it in the shower, said nothing. He used it because it was there. The drawer of creams is gone and he reordered it himself — that's how I know it actually worked.

Rachel K.

★★★★★

I sit 10 hours a day. Nothing else kept up with that.

Truck driver, 30 years. Creams can't survive a work day in the seat. A wash before the day starts turned out to be the whole answer. Five months clear.

Ray D.

★★★★★

The peeling between my toes is just… gone.

Fifteen years of sprays and powders in the socks. This cleared it in about three weeks and the smell situation improved way before that. I wash, I dry between the toes, that's the routine.

Dan R.

★★★★★

Work boots 11 hours a day and my feet are finally normal.

Warehouse job, can't change the boots. Turns out the shower was the one part of the cycle I could control. Three weeks in, no peeling, and I stopped dreading taking my shoes off at home.

Denny M.

★★★★★

Runner. This fixed the thing I'd accepted as permanent.

Marathon training meant wet shoes constantly and flare-ups after every long run. A month of daily washes and my feet stopped being part of my race planning. Genuinely didn't expect that.

Marcus T.

★★★★★

The patch on my arm faded in two weeks.

BJJ, so ringworm is basically an occupational hazard. Coach recommended washing right after rolling. The active edge stopped spreading first, then the whole patch faded. Half the team uses it now.

Alex V.

★★★★★

It stopped hopping around my family.

Son got it at wrestling practice, then his little sister had a spot, then me. Pediatrician visits, creams for everyone. One bar in the shower for the whole house ended the merry-go-round in about a month.

Paul S.

★★★★★

Cleared the patch AND the two spots I hadn't noticed yet.

That's the thing about a wash versus a cream — I was only treating the patch I could see. Two smaller ones on my shoulder never got the chance to grow. Smart way to do it.

Jordan W.

★★★★★

Finally something that isn't a prescription or a home remedy.

Summer + sports bras = the same irritation under the band every year. I'd tried powder, cornstarch, everything my group chat suggested. This cleared it in two weeks and it hasn't been back since.

Monica L.

★★★★★

Gym girl summer, zero flare-ups. First time ever.

I train 5 days a week and live in sports bras. Used to manage the fold irritation with powder and prayer. Now it's just part of my shower and I honestly forget it used to be a problem.

Dani R.

★★★★★

My dermatologist said "whatever you're doing, keep doing it."

Recurring irritation in the fold for two years, worse every heat wave. Washing daily and drying properly — that's it, that's the whole protocol. The skin tone evened back out too, which I didn't expect.

Teresa B.

Watch Their Timelines

Us vs. Them

Not another spot treatment. A daily wash that covers everywhere the fungus lives — for less than the tube you keep re-buying.

IronBark
Antifungal
Cream
Medicated
Powder
Cost per application
~$0.27
~$0.55
~$0.40
Breaks through the fungal biofilm
Covers the whole body in one use
No extra step (works in your shower)
Targeted spot treatment
Keeps shoes & socks dry-feeling
Rebuilds the skin barrier
Cost per application based on a 113g bar at $15.97 (bundle price) lasting ~60 washes vs. typical drugstore pricing. Update to your real math.
Dr. Henry Zimmermann

“Most antifungals only ever treat the surface”

“The part nobody explains to patients is the biofilm — the shield the fungus builds within days. Creams sit on top of it, which is why the relief never holds. A daily wash that disrupts the biofilm first, then supports the skin barrier, is the most sensible routine I can recommend for recurring cases.”

Dr. Henry Zimmermann

Microbiologist

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Any last questions?

It's our standard launch offer, but it rotates with inventory — during peak summer months the bundle regularly sells out and reverts to single-bar pricing until restock. If you're seeing it now, it's live now.
Each bar is a full-size 4 oz (113g) IronBark Tea Tree Antifungal Bar — about 4 weeks of daily washes per bar (a draining soap dish extends that). The 3-bar bundle covers the full clearing stretch with plenty left over for the months after.
Orders process in 1–2 business days and arrive within 5–10 business days with tracking, shipped from the USA. Bundles ship free.
Most customers report the itch easing within the first week of daily washing, with visible skin improvement over 2–3 weeks. Long-standing cases take longer — that's normal, and it's why the guarantee runs a full 60 days instead of 30.
You can — but most people don't, and honestly there's no reason to. It's a regular body soap at heart: all-natural, no steroids, no synthetic fragrance, and gentler on skin than most drugstore bars. So it just becomes the soap in your shower. The nice side effect of that is the fungus never gets the warm, undisturbed window it needs to rebuild — which is exactly how the "clears up then comes back" cycle ends for good.
Simple: if you're not seeing improvement after daily use, email us within 60 days of delivery for a full refund — used bars and all, no return shipping, no forms, no questions. Fewer than 3% of customers ever need it.

2,245+ Reviews. Here's The Honest Spread.

4.9
★★★★★
2,245 verified reviews
5 ★
88%
4 ★
8%
3 ★
2%
2 ★
1%
1 ★
1%
★★★★★Jock Itch

Three summers of "mild." Not anymore.

I kept calling it mild because I could live with it. Mild every June, mild every July. Started daily washes in spring — first summer I'm not managing anything. Even the darker patch it left is fading.

Paul S. · ✓ Verified buyer

★★★★★Athlete's Foot

Work boots 11 hours. This kept up.

Sprays evaporate in the boot, powder turns to paste. A wash before work turned out to be the answer. Three weeks in the peeling stopped, and the smell situation improved way before that.

Denny M. · ✓ Verified buyer

★★★★☆Athlete's Foot

Works — just slower than I hoped

The site says 1–4 weeks. Mine took closer to five, probably because I've had this for a decade. Docking a star for the wait, but I want to be fair: it's the only thing that's ever actually kept it away. Month three now.

Carl W. · ✓ Verified buyer

★★★★★Under-Boob

Sports bra summer, zero flare-ups

I train five days a week. Used to manage the fold irritation with powder and hope. Two weeks with the bar and it cleared; now it's just part of my shower. Skin tone under the band evened out too.

Dani R. · ✓ Verified buyer

★★★★★Body Ringworm

Half our BJJ team uses it now

Ringworm is an occupational hazard on the mats. Wash right after rolling — the patch on my forearm stopped spreading in days and faded in two weeks. Coach keeps a bar in the gym shower now.

Alex V. · ✓ Verified buyer

★★★☆☆Athlete's Foot

Good results, bar wears down fast

Feet cleared in about three weeks, so no complaints on results. But washing twice a day, the bar was mostly gone by week four. Get the 3-pack, one bar won't last a heavy-use month. A soap dish that drains helps a lot.

Miguel T. · ✓ Verified buyer

IronBark replied: Fair point, Miguel — a draining dish roughly doubles bar life, and twice-daily users should plan on the 3-pack. Glad the feet came around.
★★★★★Jock Itch

Bought it for my husband. He reordered it himself.

Put it in the shower without a word. He used it because it was there. The drawer of half-used creams went in the trash last month — and the reorder confirmation email was addressed to him, not me.

Rachel K. · ✓ Verified buyer

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