35K+ Happy Customers

Excellent 4.7

Built to stay fresh

Stretchy, water repellent performance basics designed to keep you looking sharp all day.

Shop this

Stay fresh all day

Blocks visible sweat marks and helps prevent odor.

No iron needed

Wrinkle resistant fabric keeps you looking sharp.

Built for long days

Lightweight comfort for work, travel and after hours.

Underform Sweatproof Undershirt — front view
Underform Sweatproof Undershirt — product detail
Underform Sweatproof Undershirt — product detail, alternate angle
Underform Sweatproof Undershirt — worn under an outer shirt
Sweat Blocking Undershirt
Underform Sweatproof Undershirt — fabric and fit detail
Underform Sweatproof Undershirt — Crew Neck and Deep V-Neck compared
Underform Sweatproof Undershirt — White and Black colour options
Underform Sweatproof Undershirt — protected underarm construction
Underform Sweatproof Undershirt — front view
Underform Sweatproof Undershirt — product detail
Underform Sweatproof Undershirt — product detail, alternate angle
Underform Sweatproof Undershirt — worn under an outer shirt
Sweat Blocking Undershirt
Underform Sweatproof Undershirt — fabric and fit detail
Underform Sweatproof Undershirt — Crew Neck and Deep V-Neck compared
Underform Sweatproof Undershirt — White and Black colour options
Underform Sweatproof Undershirt — protected underarm construction

Underform Sweat-Protective Undershirt

Keep underarm sweat off the shirt people see.

★ ★ ★ ★ ★
4.6/5 based on 1,067 reviews
£35.00
/
Tax included.
Color
Size
Neck Style
Secure checkout
Visa Maestro Mastercard American Express PayPal Google Pay
30-Day Fit Guarantee
Easy Returns
Secure Checkout

Use collapsible tabs for more detailed information that will help customers make a purchasing decision.

Ex: Shipping and return policies, size guides, and other common questions.

Use collapsible tabs for more detailed information that will help customers make a purchasing decision.

Ex: Shipping and return policies, size guides, and other common questions.

Size Chest Waist Fit
S 86–94 cm 74–82 cm Slim
M 94–102 cm 82–90 cm Fitted
L 102–110 cm 90–98 cm Fitted
XL 110–118 cm 98–106 cm Comfort
XXL 118–126 cm 106–114 cm Comfort
Model reference Model is 185 cm and wears size M.
Fit guarantee Not the right fit? Return or exchange within 30 days.

How it works

Sweat blocking Panel

Sweat blocking Panel

0%

100% The waterproof underarm panel blocks sweat from reaching the surface, so you do not have to worry about visible underarm sweat marks.

3-LAYER ODOR CONTROL

3-LAYER ODOR CONTROL

0%

Blocks up to 80% of odour build-up, helping you stay fresh without worrying about body odour after long days. Soft-touch comfort feels smooth against your skin.

Elastane stretch

Elastane stretch

0%

5% Elastane helps the shirt move with your body and stay close under shirts, polos and workwear, so it does not ride up, bunch or show during your day.

Sweat blocking Panel

Sweat blocking Panel

0%

100% The waterproof underarm panel blocks sweat from reaching the surface, so you do not have to worry about visible underarm sweat marks.

3-LAYER ODOR CONTROL

3-LAYER ODOR CONTROL

0%

Blocks up to 80% of odour build-up, helping you stay fresh without worrying about body odour after long days. Soft-touch comfort feels smooth against your skin.

Elastane stretch

Elastane stretch

0%

5% Elastane helps the shirt move with your body and stay close under shirts, polos and workwear, so it does not ride up, bunch or show during your day.

Made to perform. Trusted to deliver.

Excellent

4.6

/ 5

based on 1067 reviews

It works for me

I bought one to try and ordered more after a few days. It’s comfortable, not too thick, and my shirt stays looking better for longer. I bought one to try and ordered more after a few days. It’s comfortable, not too thick, and my shirt... I bought one to try and ordered more after a few days. It’s comfortable, not too thick, and my shirt stays looking better for longer.

Dylan

Great

Really simple product, but it does what I needed. I wear it under my office shirts and it just makes me feel a bit more confident during the day. Really simple product, but it does what I needed. I wear it under my office shirts and it just makes... Really simple product, but it does what I needed. I wear it under my office shirts and it just makes me feel a bit more confident during the day.

Oliver

Solid

Honestly just a solid basic. Feels good, looks clean under a shirt and does the job. I’ll probably get a few more. Honestly just a solid basic. Feels good, looks clean under a shirt and does the job. I’ll probably get a... Honestly just a solid basic. Feels good, looks clean under a shirt and does the job. I’ll probably get a few more.

Harry

Nice

Didn’t expect much tbh, but I actually wear it almost every workday now. It sits good under my shirts and I don’t have to think about sweat marks all the time. Didn’t expect much tbh, but I actually wear it almost every workday now. It sits good under my shirts and... Didn’t expect much tbh, but I actually wear it almost every workday now. It sits good under my shirts and I don’t have to think about sweat marks all the time.

Thomas

Good quality

The material feels really nice. Soft, but still fitted. I hate undershirts that feel bulky, this one doesn’t. The material feels really nice. Soft, but still fitted. I hate undershirts that feel bulky, this one doesn’t. The material feels really nice. Soft, but still fitted. I hate undershirts that feel bulky, this one doesn’t.

Ben

No sweatmarks

I wear it mostly when I have client meetings. Just gives me peace of mind knowing I’m not going to have obvious sweat marks halfway through the day. I wear it mostly when I have client meetings. Just gives me peace of mind knowing I’m not going to... I wear it mostly when I have client meetings. Just gives me peace of mind knowing I’m not going to have obvious sweat marks halfway through the day.

Daniel

Like advertised

Works great under my white shirts. You don’t really see it, which was the main thing for me. Fit is good too, not too tight. Works great under my white shirts. You don’t really see it, which was the main thing for me. Fit is... Works great under my white shirts. You don’t really see it, which was the main thing for me. Fit is good too, not too tight.

Archie

View All
Sweat blocking technology

Stop sweat marks before they show.

Underform is engineered with a water resistant underarm panel that helps block moisture before it reaches your shirt. So you stay fresh, sharp and confident through meetings, commutes and long workdays.

Helps prevent visible underarm sweat marks

Keeps your outer shirt looking clean and dry

Built for pressure, heat and long workdays

Shop now


From sweat marks to confidence

Slide to compare: without Underform, sweat marks show through. With Underform, your shirt stays clean, dry-looking and ready for the rest of the day.

Without Underform
With Underform