She refused to go to school - now refuses to go without it!

Sweatnix silver-infused undershirts stop sweat patches before they start — invisible under any uniform, any colour.

Shop School undershirts

Sweat-Proof Armpit Protection

Odour gone — Silver fabric neutralises smell all day

Stays Invisible Under

any colour shirt

Australian-Designed

Australian Designed

Find Your Perfect School Undershirt

No more yellow stains on white shirts, no more visible sweat patches on coloured shirts .

Women’s Crop Undershirt

$89.00

$69.00

Men's V-Neck Undershirt

$89.00

$69.00

Shop school undershirts

Made For All-Day Comfort

Made For
All-Day Comfort

Lightweight, breathable, and designed to stay invisible under anything you wear, all day long.

Odor Neutralising Freshness

Helps reduce sweat-related smell so you stay fresh during stress, heat, or busy days.

Invisible Tailored Fit Design

Designed to lay flat under clothing with a smooth, no-lines finish for a confident look.

Sweat Control Technology

Pulls moisture away from the skin to keep you dry and comfortable throughout the day.

Breathable Soft Modal Fabric

Lightweight and smooth against the skin, offering cool breathability without cling or bulk.

Sweat Control Technology

Pulls moisture away from the skin to keep you dry and comfortable throughout the day.

Breathable Soft Modal Fabric

Lightweight and smooth against the skin, offering cool breathability without cling or bulk.

Odor Neutralising Freshness

Helps reduce sweat-related smell so you stay fresh during stress, heat, or busy days.

Invisible Tailored Fit Design

Designed to lay flat under clothing with a smooth, no-lines finish for a confident look.

How Sweatnix was born...

When my daughter changed schools, her new mid-blue shirt made every sweaty moment visible. She was mortified.

I went looking for a solution and couldn't find one that actually worked — so I made one.

Sweatnix undershirts are silver-infused to neutralise odour and block sweat patches before they form. Invisible under any uniform.

Comfortable enough that she won't take it off.

— Zoe, Sweatnix founder & mum

Your wardrobe's new best friend

Stop sweat before it ever reaches your outerwear. Sweatnix’s multi-layer sweat-control design keeps you dry, polished, and confident in any setting.

Protect your delicate fabrics and knits from the ravages of deoderants and harsh drycleaning processes.

See the Difference

The Difference You Can See

Ordinary shirts let sweat show through. Sweatnix blocks moisture before it reaches the outer layer, keeping you dry, polished, and confident in any setting.

See the Sweat-Proof Design

How People Stay Sweat-Free

See how Sweatnix helps different people stay dry, secure, and worry-free,

no matter what their day brings.

Kate S.

“Finally a top that stays put and keeps my underarms dry & smell free. I feel fresher and more confident throughout the entire day.”

Susie W.

“Sweatnix kept my luggage light and smelling great for the whole trip! I won't travel without it from now on.”

Daniel K.

“I wear it to work after my workout and still no stains. It is invisible under my clothes but saves me every time.”

Marcus T,

“This shirt gets me through my commute and my workday without a single sweat mark. Absolute game changer.”

Where Sweatnix Began

Sweatnix started with a simple idea: create undershirts that do more than add a layer. We wanted something soft, discreet, and genuinely better than the usual undershirt.

Men have been wearing undershirts for years, so we wanted to create the ultimate - and also to include something to suit women who "glow" a bit more than they would like!

From teen girls managing school uniforms to women experiencing perimenopause, our goal has always been to make sweating less stressful. With sweat-absorbing technology and breathable fabrics, Sweatnix helps you feel fresh and comfortable from morning to night.