Free Domestic Shipping Over $50


Free Returns


Made in the USA

Men's Sweat Proof Military Shirt - Original Fit Crewneck

Men's Sweat Proof Military Shirt - Original Fit Crewneck

Sweat Proof Guarantee
Sweat Proof Guarantee

Free Domestic Shipping Over $50 Shipping Information

Get Unrivaled Sweat Protection with our Military Undershirt

The Thompson Tee military undershirt features hardcore sweat proof technology that blocks underarm sweat stains and odor. You can wear our military shirts under uniforms, dress shirts, fatigues or on its own.

Our military undershirts are available in navy, olive drab green, tan 499 and coyote brown, are made with 100% cotton and proudly manufactured and shipped from the USA.

Purchase our military undershirts with confidence: our sweat proof shirts are backed by a Sweat Proof Guarantee, so you can wear it and wash it for 30 days, risk-free.

Patented Sweat Proof Technology for Men's Original Fit Sweat Proof Military Shirts

Patented, Sweat Proof Technology


Proprietary design stops sweat from showing through your underarms — period.


Center seam with separate front and back sweat panels for a sleek, tailored fit and feel.


Sweat proof technology won't wash out or lose effectiveness over time. Prevent pit stains day after day, wash after wash.

Men's Original Fit Sweat Proof Military Shirt Features
Feature 1

Ultra-soft, lightweight combed cotton

Thompson Tee military undershirts are made with 100% premium combed cotton.

Feature 2

Tagless, lay flat collar

Itchy, scratchy tags are a thing of the past. Thompson Tee's tagless design ensures the shirt lays flat with no unsightly bunching.

Feature 3

Machine washer and dryer safe

Machine wash our military undershirts in cold or warm water and dry on medium (or lower) heat.

Tuckable Men's Original Fit Sweat Proof Military Shirts

The Perfect Military Tuck Length

Move through your day without distractions and interruptions. Thompson Tee's military undershirts feature extra length so you get the perfect military tuck that stays in place all day.

Customers Also Viewed

Thompson Tee Guarantee

The Original Sweat Proof Undershirt

We're serious when we say no more pit stains. We guarantee sweat won't penetrate the underarm barrier -- or your money back!

Thompson Tee Guarantee

Free Returns

Wear it, wash it and try it. We offer free returns on all opened or used shirts up to 30 days from purchase date.

Thompson Tee Guarantee

Made in USA

Every phase of production is completed in the USA - from materials to manufacturing. Each undershirt purchase supports U.S. jobs and manufacturing.

Thompson Tee Guarantee

Real Customer Service

No web bots here. We have a team of friendly people ready to answer all of your questions.

Size Chart

The Thompson Tee Original Fit styles fit like a traditional undershirt. If you want more of a looser, t-shirt fit, order up one size.

XS Chest 32 in / 82 cm
S Chest 34 - 36 in / 86 - 92 cm
M Chest 38 - 40 in / 97 - 102 cm
L Chest 42 - 44 in / 106 - 112 cm
XL Chest 46 - 48 in / 115 - 122 cm
2XL Chest 50 - 52 in / 127 - 132 cm
3XL Chest 54 - 56 in / 137 - 142 cm
Chest - inches 32 34 - 36 38 - 40 42 - 44 46 - 48 50 - 52 54 - 56
Chest - cm 82 86 - 92 97 - 102 106 - 112 115 - 122 127 - 132 137 - 142

Faqs about our tees

How is the Thompson Tee different from other "sweat proof" shirts?
Is the underarm barrier really sweat proof?
How does the sweat proof underarm barrier compare to sweat pads?