Stop sweat patches showing on your underarms AND upper back.
The invisible sweat-patch assassin
💧 STOPS UNDERARM + BACK SWEAT SHOWING ON YOUR SHIRT 🛡️ ODOUR CONTROL 👕 LIGHT, SOFT & INVISIBLE
★★★★★ 4.7 | 527 REVIEWS
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You know the drill:
1️⃣ Wear black or navy.
2️⃣ Sneaky armpit checks all day long.
3️⃣ Jacket ON when its hot, not off.
🔁 Repeat tomorrow.
You shouldn't have to dress around sweat.
The only Aussie brand that stops sweat showing on your shirt at the underarms AND upper back.
Soft, lightweight MicroModal fits slim and stays invisible under your shirt.
We integrated odour-combating technology to keep you smelling fresh.
Check our sizing guide before you order to make sure LayerOne works seamlessly under your shirts.
If your size isn’t available get in touch with us - we want every man to say goodbye to sweat stains for good!
Free tracked shipping Australia-wide.
Orders ship the next business day and usually arrive within 2–3 business days.
We’re confident LayerOne will outperform every undershirt you’ve worn. That’s why your purchase is backed by our 30-Day Guarantee.
If it doesn’t keep you drier, fresher, and more comfortable, send it back for a full refund or size exchange. No stress, no hassle.
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30-Day Money-Back Guarantee
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🚨We Tried to Make LayerOne Leak🚨
We poured water directly onto LayerOne's sweat-proof barriers.
Then we put a steak weight on top.
Watch what happened.
This isn't your Dad's undershirt.
Every detail has been engineered for the modern man, using the latest technology.
Varies
Most don't
Varies
noticed fewer visible sweat marks.
said their nice shirts lasted longer.
finally felt comfortable wearing the colours they'd been avoiding.
Wear your first LayerOne and see how it performs under your own shirts.
If it’s not right for you, simply return or exchange it within 30 days.
IT REALLY IS THIS SIMPLE.
NOT ON YOUR SWEAT.
"Won't it make me hotter?"
Fair question. It IS another layer.
But if you can’t stop the sweat, something has to stop it reaching your shirt.
And since you don't need sweat-proofing everywhere, we only put it where you need it most. The rest is ridiculously light, breathable and silky cool on your body.
The real cost of living with sweat patches.
$
$$
$$$$$
Wasted money
Cheap fixes. Expensive habit.
$15 clinical antiperspirant. $20 armpit pads. $30 generic undershirt from the shops. The sweat keeps coming through. So you keep buying more. How much have you spent already?
❌ Without LayerOne
✅ With LayerOne
Your good shirts
Another $120 gone.
The disgusting yellow armpit stains that won't wash out. Your favourite $120 work shirt ruined before its time. You paid good money to look sharp, only to chuck it out because of sweat. How many more shirts are you going to sacrifice?
❌ Without LayerOne
✅ With LayerOne
Your reputation
You're sweating away opportunities.
You can be the best at your job. But if all people remember is how sweaty you look in every meeting, you've got a problem. Because at work, perception can matter just as much as performance.
❌ Without LayerOne
✅ With LayerOne
Frequently Asked Questions
LayerOne is made from feather-light, breathable Lenzing MicroModal that's 50% finer than cotton. It's maximum protection, minimum bulk, so you're not chafing.
Heck yes! SweatIntercept™ Technology 🛑 stops sweat 🛑 in its tracks so it never reaches your outer shirt. We protect your armpits and we're the only ones in Australia who also protect your upper back... the two places most men show sweat the most.
Yep, LayerOne is made for heavy sweaters too. We've had guys with hyperhidrosis, guys who've had surgery, and guys who came to us as a LAST RESORT after trying just about everything else. They were sceptical too. Here's the difference: we're not trying to stop you sweating. We're stopping that sweat from reaching your outer shirt. SweatIntercept™ Technology is battle-tested on blokes who sweat BUCKETS. 🪣
No. The slim, tapered fit, low v-neck, and the light MicroModal fabric, together mean it disappears under any dress shirt or polo.
You’re covered by our 30-day First Product Guarantee. If it doesn't work, send it back for a full refund.
Your first LayerOne undershirt is backed by our 30-Day First Product Guarantee. If it doesn’t keep you drier, fresher, and more comfortable, send it back for a full refund or size exchange.
We offer this because we know LayerOne performs. And we want you to try it with complete confidence.
Here's our Size Guide. For the best fit, measure yourself. In general, go with your usual slim-fit tee size. Between sizes? We suggest sizing down for the best sweat protection and invisible fit.
Yes. SILVADUR™ silver ions are built into the fabric to fight odour-causing bacteria, wash after wash.
Absolutely. LayerOne is OEKO-TEX® 100 certified (free from harmful substances), which is skin-safe and gentle, even on sensitive skin.
Easy. Machine wash cold (40°c max). Tumble dry low if you need, but line drying is best. Do not bleach or iron.
More questions? See our full FAQ
