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Affiliate links · Last verified 2026-05-21 · 🌍 Outside the US? Amazon and eBay will redirect you to your country's local store automatically.
The Story
It’s a truly embarrassing (and often super-secret) condition: over-sweating. As a sufferer of hyperhidrosis, the clinical term of excessive regular sweating, Billy Thompson tried everything to alleviate his underarm dampness.
The Pitch on Shark Tank
Thompson Sweat Proof Undershirts appeared on Shark Tank (Season 8) in 2017. Billy Thompson pitched the product to the Sharks.
Frequently Asked Questions
Is Thompson Sweat Proof Undershirts still in business?
Thompson Sweat Proof Undershirts is still listed on Amazon and eBay — see the buy links below for the latest availability.
Who founded Thompson Sweat Proof Undershirts?
Thompson Sweat Proof Undershirts was founded by Billy Thompson.
Did Thompson Sweat Proof Undershirts get a deal on Shark Tank?
Deal details from the original pitch aren't in our records.
Where can I buy Thompson Sweat Proof Undershirts?
Thompson Sweat Proof Undershirts is available on Amazon and eBay. We compare current prices across both at our /results page — link below.
Related from Shark Tank
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