Thompson Tee is a pioneer and market leader that set the standard for sweat proof undershirts.

Two men and one woman wearing Thompson Tee undershirts
Woman wearing white crewneck Thompson Tee

Our Mission

Thompson Tee’s mission is to provide a safe, convenient and reliable solution for those dealing with excessive underarm sweat. We aim to increase hyperhidrosis awareness and reduce the stigma of underarm sweat, helping our customers feel comfortable in their own skin, every day.

Our Story

Hi, I'm Billy Thompson, founder and president of Thompson Tee.

I've had axillary hyperhidrosis, or excessive underarm sweating, for as long as I can remember. I learned to live with my condition — practicing ridiculous deodorant rituals, swearing off colored shirts and doing everything imaginable to conceal my underarm sweat marks.

I spent many years working in sales, and would sweat right through my undershirts and dress shirts. It was uncomfortable, embarrassing and expensive. I knew there had to a better way to manage this problem.

Picture of Billy Thompson and Randy Choi

In 2011, I approached my friend Randy Choi, who had experience working in the apparel industry. I learned that he too, could relate to the struggles of excessive sweating. Randy, who suffered from cranial hyperhidrosis as a teen, underwent sweat gland removal surgery, only to end up with severe side effects like all-over sweating, skin problems, slow metabolism and fatigue as a result.

Bound by our passion to create a safe, affordable and convenient solution, Randy and I developed a lightweight, breathable, comfortable and truly integrated underarm barrier that would completely absorb sweat, withstand the toughest stains, and help those living with axillary hyperhidrosis.

We've come a long way and hit many milestones since!

Picture of Billy Thompson and Randy Choi


Billy & Randy working on designs

The Beginning

Billy Thompson and Randy Choi bootstrapped Thompson Tee with $20k of their own money. Within two years, Billy accumulated $100k in credit card debt by putting all profits back into the company. Neither Billy nor Randy took a paycheck or sought additional capital in order to keep production from going overseas.


Thompson Tee co-founder on Shark Tank


An appearance on TV’s “Shark Tank” boosted sales, depleting our inventory within days after the show aired. The additional visibility helped Thompson Tee hit 100% growth for several years afterward.


Thompson Tee undershirts in a drawer


Milestone achieved! With a growing base of 250,000 satisfied customers across 135 countries, Thompson Tee sold one million shirts – making a huge difference in the lives of our customers.


Thompson Tee co-founders holding a Thank You sign


No better way to celebrate our 10 year anniversary! Thompson Tee continues on the road to long-term success hitting another huge milestone! Future plans include a line of sweat proof outerwear.

Headshot of Billy Thompson

"I had learned to live with my condition – practicing ridiculous deodorant rituals, swearing off colored shirts and doing everything imaginable to conceal my underarm sweat marks...
I knew there had to a better way to manage this problem."

- Billy Thompson

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 Man wearing a white crewneck original fit Thompson Tee

Our Values

At Thompson Tee, our values guide everything we do. We believe in creating products that not only bring exceptional comfort and performance but also reflect our core principles.

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Every Thompson Tee is meticulously designed and manufactured with the utmost attention to detail. From the selection of premium materials to precision stitching, we ensure that each garment meets the highest standards of quality.

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100% Customer Satisfaction

Relying on your feedback, we are dedicated to providing an exceptional customer experience, from the moment you browse our website, to the day you wear your first Thompson Tee, and then return for more.

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Ethical & Sustainable Manufacturing

Thompson Tee products are manufactured in American and global facilities that adhere to the highest fair labor and environmentally-friendly standards.

Who Loves Thompson Tee?

Everyone sweats, but those who sweat a lot hold a special place in their hearts for our sweat proof tees! Here are some of Thompson Tee’s biggest fans:

  • Axillary hyperhidrosis sufferers
  • Those who work outdoors or have stressful indoor jobs
  • Those with social anxiety or nervous sweating
  • Teenagers
  • Menopausal women
Man wearing white Thompson Tee under an unbuttoned dress shirt. Man posing in a black Thompson Tee
Woman wearing black Thompson Tee under a blue dress shirt Two men wearing v neck and crewneck white Thompson Tees

Why Thompson Tee

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The Original Sweat Proof Undershirt

We are the only true sweat proof undershirt brand, backed by a patent from the U.S. Patent and Trademark Office.

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Patented Hydro-Shield® Technology

No chemicals! Our state-of-the-art Hydro-Shield® technology won’t wash out or lose effectiveness over time.

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Designed in the USA

All our shirts are designed in the USA. Plus, our apparel designers, customer service team, warehousing and marketing are 100% US-based.

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100% Money-Back Guarantee

We’re confident that you’ll love our products. Go ahead – wear it and wash it risk-free for 30 days.