Our classic, best selling men's V-neck undershirt features patented sweat proof technology that stops sweat in its tracks. Say goodbye to sweat marks, stains and underarm odor!
Thompson Tee sweat proof undershirts are backed by our sweat proof guarantee.
Wear the Thompson Tee Slim fit V-neck beneath your outfits and gain the confidence to tackle any sweaty situation without fear of wet marks!
Features
Sewn-in sweat proof underarm pads that prevent sweat marks and stains
Short sleeve
90-95% Bamboo Rayon/Viscose and 5-10% spandex
Technology
Our patented, clinical-grade Hydro-Shield® technology stops underarm sweat from seeping onto outer layers. Through proprietary layering and stitching that creates reverse osmosis, sweat is drawn away from the skin and evaporated.
The Hydro-Shield® pads are seamlessly integrated into the shirt's design, requiring no adjustments.
Size & Fit
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
XS
S
M
L
XL
2XL
3XL
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
Hydro-Shield®: The Only Patented Sweat Proof Technology
Proprietary design 100% blocks underarm sweat from showing through your outer layers.
Center seam with separate front and back sweat panels for a sleek, tailored fit and feel.
The sweat proof technology will not diminish or lose its effectiveness over time. Wear and wash it as often as you need.
Premium Bamboo Rayon
Made of 90-95% Bamboo Rayon/Viscose and 5-10% spandex
Tagless Design
Our tagless design eliminates the irritation of itchy tags and ensures a smooth fit without any unsightly fabric bunching.
Machine Washer and Dryer-Safe
No special care necessary — you can safely wash in cold or warm water, and dry at medium or low temperature.
Long, Tuckable Length That Stays Put
Move through your day freely. Thompson Tee’s long, tuckable length stays in place all day. So go ahead and express yourself with an arm wave or two!
30-Day Risk-Free Returns
Wear it, wash it, return it within 30 days if unsatisfied
The OG Sweat proof Undershirt
Thompson Tee is the only patented sweat proof undershirt on the market. We guarantee sweat won’t break through the underarm barrier — or your money back
Designed in the USA
All our products are designed in America. We partner with American and global facilities that commit to the highest fair labor and environmentally-friendly standards.
Real Customer Service
No web bots here. We pride ourselves in having a team of friendly people ready to help you with any questions you might have.
Reviews
FAQs about our tees
How is the Thompson Tee different from other "sweat proof" shirts?
The Thompson Tee is the original sweat proof undershirt.
It's the only
undershirt backed by a patent from the U.S. Patent and Trademark Office for our Hydro-Shield
sweat proof technology, which completely absorbs and blocks sweat while maintaining breathability.
Although others might say "sweat proof," no undershirt can protect you like the proven Thompson Tee,
and no other shirt has patented technology to back up such a claim.
Here are a few of the features that make our sweat proof undershirts unique:
Proprietary layering and stitching system blocks sweat from seeping through your underarms.
Sweat proof technology won’t wash out or lose effectiveness over time.
Separate front and back panels to trap sweat effectively, minimize heat build-up and keep you
feeling cool.
The underarm barriers are created with a center seam design for a sleek, smooth fit that
doesn’t bunch under your clothing.
Original Fit vs Slim Fit: Which one is right for me?
The shirt and size you choose will ultimately depend on your fit and style preferences.
Both our Men’s and Women’s Slim Fit shirts are made with rayon from bamboo and are
intended to fit snug, so they’re more discreet underneath your clothing.
The Original Fit is made from 100% premium combed cotton and provides a little more breathing room
for those who prefer a looser undershirt. If you're looking for the most sweat protection but like
the fit of a typical T-shirt, you may want to try a size up in the Original Fit shirts.
Either way, both options come with our proprietary Hydro-Shield Sweat Proof Technology, backed by our
Sweat Proof Guarantee!
For the complete guide to choosing the right Thompson Tee size and style for you, check out our blog
here.
Is the underarm barrier really sweat proof?
YES - We didn't just call it "sweat proof." We earned it! The Thompson Tee is the only patented
proprietary design that uses a clinical-grade sweat proof material that completely blocks moisture
from passing through. Other shirts may advertise "sweat proof" but don’t hold moisture well.
They typically consist of two cotton layers and are often treated with chemicals that could wash out
over time. The benefits of our sweat proof technology are native properties, so the shirt will not
lose its effectiveness over time. That's why every Thompson Tee with Hydro-Shield Sweat Proof
Technology comes with a Sweat Proof Guarantee. We guarantee that your underarm sweat won’t
penetrate the sweat proof barrier — or your money back!
How does the sweat proof underarm barrier compare to sweat pads?
While armpit pads and sweat shields may absorb some sweat, they do not allow moisture to evaporate.
So throughout the day, armpit pads can lose their stickiness due to sweat or become heavy and bulky
beneath your shirt.
Unlike sweat shields, garment guards and sweat pads, Thompson Tee's sweat proof barrier is the only
patented sweat proof technology available. By trapping sweat and releasing it through evaporation,
your sweat won't show through your outerwear. Plus, you won't have to worry about adjusting your
sweat pad or changing it out for a new one throughout the day.
For more in-depth information on sweat pads and sweat shields, check out our page dedicated to the
topic here.
Sweat Proof Guarantee
