UnderWarmer on Shark Tank

Name: UnderWarmer
Price: 14.99 USD
Availability: InStock

A disposable base-layer shirt with air-activated heat packs built in, giving up to about 12 hours of warmth with no batteries or charging. It is meant for hunters, outdoor workers and fans at cold-weather games.

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Official website checked Nov 1, 2026.

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Typical price: about $14.99 (may vary)

⏱ UnderWarmer in 30 seconds

The ask$100K for 15%Valued at $666.7K
In the tankDeal: $100K for 20%With Kendra · plus royalty
After the showNot confirmedNo public record either way
TodayStill in business

UnderWarmer Shark Tank deal

Asked for: $100,000 for 15%
Asking valuation: $666.7K
Result: Deal
Final deal: $100,000 for 20%
Deal valuation: $500K
Shark: Kendra Scott
Structure: Royalty
Founders: Paul Schaefer, Bryan Schaefer
From: -
Aired: Oct 7, 2026

Deal notes: $100,000 for 20% plus a $0.50 royalty per shirt sold; royalty cap or term not reported.

Asked

$666.7K

Got

$500K

Would you have invested in UnderWarmer?

The pitch

Paul Schaefer, Bryan Schaefer pitched UnderWarmer in Shark Tank Season 18, Episode 3 (aired Oct 7, 2026). They asked for $100,000 in exchange for 15% equity, valuing the business at $666.7K. The entrepreneurs walked away with a deal from Kendra Scott: $100,000 for 20%. That put the final valuation at $500K, 25% below what they originally asked for. The deal included a royalty.