Chuckie spent years building what he thought was the world's toughest tee. First version: hemp-polyester. Strong - but loaded with PFAS.
Use size chart below for slightly relaxed fit.
For snug fit, size down.
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THE TEE YOU
WEAR EVERY DAY?
IT'S MADE
OF PLASTIC
And it's doing more damage than you think.
Every wash. Every wear. Every day.
POLYESTER = PETROLEUM PLASTIC
60–90% of "premium" men's tees are polyester - petroleum-derived plastic. Different logos. Same cheap plastic. You wear it 16 hours a day.
SHEDS MICROPLASTICS EVERY WASH
Every wash releases hundreds of thousands of plastic particles. Scientists are finding microplastics in places every man should know about.
BUILT TO FAIL. ON PURPOSE
Cotton sags. Polyester stinks. Both fall apart in 6–12 months by design. That's how they keep you buying $150–$200/year. Forever.
HE BUILT SOMETHING TOXIC. THEN BURNED IT DOWN.
HE BUILT SOMETHING TOXIC. THEN BURNED IT DOWN.
Then he and his wife Shelby started trying to start a family. He went deep into research on male fertility. That's when he found the studies.
"Microplastics. PFAS. Endocrine disruptors. The research was undeniable. I was literally selling men a shirt that could be working against them. So I burned the whole thing down and started over."
Chuckie, Founder of UndrDog Hemp
Almost a year and $300,000 later - UndrDog was rebuilt from scratch. Hemp. Bamboo. Organic cotton. Zero polyester. Zero shortcuts.
SCIENTISTS
ARE FINDING MICROPLASTICS
IN PLACES MEN DON'T WANT THEM
HUMAN TESTS
2024Scientists detected microplastics - including polyester-derived PET - inside every human testicle they tested.
Zhang et al. (2024) / PubMed ID 38745431
HUMAN BRAIN TISSUE
2025Early research in Nature Medicine detected microplastics - including polyester-type PET - in human brain tissue samples.
Britt et al. (2025) / Nature Medicine
CARDIOVASCULAR
2024Research found micro- and nanoplastics in human artery plaques, associated with higher incidence of heart attack, stroke, and death.
Marfella et al. (2024) / PubMed PMID 38426974
PATENT-PENDING DURAFLOW™
Not a coating. Not a gimmick. Built into the structure of the fiber itself - permanent.
HEMP
Earth's strongest natural fiber. 4x stronger than cotton. Holds shape for life.
BAMBOO
Micro-gap structure creates constant natural airflow. Wicks sweat. Natural antimicrobial - odor never sticks.
COTTON
Chemical-free softness. No PFAS. No coatings. Feels like a man-hug - gets better after every wash.
Doesn't Rip. Doesn't Stretch.
Hemp's tensile strength survives job sites, gym sessions, and years of washing without losing shape.
No Sweat Pits. No Stink.
Bamboo's provides micro gaps + it's natural properties.
Gets Softer with Every Wash
DuraFlow™ fibers soften over time while maintaining structural strength - unlike polyester which sheds.
Zero Microplastic Shedding
100% plant-based. Zero petroleum. Zero synthetic fibers. Zero plastic released in the wash - ever.
WHAT WE
OBSESSED OVER
OBSESSED OVER
Every detail engineered so an
average build looks solid.
Nothing left to chance.
Stitch Density
Fabric Drape
Hem Curvature
Arm Taper
Stretch Recovery
Collar Snapback
Chemical Free
Durability
Airflow Mesh
Gut Hiding Fit
Odor Prevention
Wash Durability
RESULT?
A shirt that gives you insane confidence and changes how you carry yourself.
WE DON'T MAKE CLAIMS. WE DESTROY THEM
We put UndrDog through tests other brands wouldn't dare try.
Here's what happened.
Fire Test
Polyester melts into toxic goo.
UndrDog burns clean like a campfire.
One's plastic. One's plants.
Fog Test
Blasted fog under both shirts.
Polyester trapped it.
Heat stays in. UndrDog? Fog flows straight through.
300% more breathable than cotton.
BB Gun Test
Fired at a balloon inside each shirt.
Other shirts? Shredded. UndrDog? Balloon survived.
4x stronger than cotton.
Pool Float Test
Throw it in a pool. While other shirts soak up everything, ours floats.
DuraFlow™ moves moisture out instead of trapping it.
No sweat patches. No stink. No soaked-through look by noon.
Guaranteed for life.
BUILT FOR REAL MEN
NOT MODELS
EVERY INTERNET TEE BRAND
VS. UNDRDOG HEMP
Check the tag. It's all polyester. Different logo. Same plastic.
Every Internet Tee
Material
Hemp • Bamboo • Organic Cotton
Polyester
(petroleum plastic)
Plastic on Skin
Zero. None
60–90% plastic fibers
PFAS / Toxic Chemicals
Zero
Extremely common
Microplastic Shedding
None - ever
Every single wash
Breathability
DuraFlow™ Natural Airflow
Synthetic wicking only
Odor Resistance
Natural antimicrobial
Bacteria clings to plastic
Durability
Lifetime Warranty
6–18 months
Fit Design
Alpha Frame™ for real men
Built for the model
5-Year Cost
$38 (once)
$420–$750
Guarantee
Lifetime. No exceptions
30 days. Maybe.
BUY A TEE WIN ACTUAL GOLD
1 in 100 contains a real gold bar
Every UndrDog order ships with a chance. Literally 1 in 100 packages contains a real gold bar. Not a voucher. Not a coupon code. Physical gold - right inside your package.
3,640+
VERIFIED BUYERS ALREADY SWITCHED
— 4.9★ average.
Your Call.
The "Normal Tee" — 5-Year Cost
One UndrDog Tee = $38
Backed by a lifetime warranty. Rips, stretches, fades, loses shape - we replace it free.
That's About $0.02 Per Day
Over 5 years, one UndrDog tee runs 2 cents per day. The premium tee you replaced it with? $0.40/day.
Best Case: Never Buy a Tee Again
Men who buy UndrDog don't come back because theirs wore out. They come back for more colors.
Buy Once.
Wear for Life.
Really.
If your UndrDog tee ever rips, stretches, shrinks, fades, or stops performing - we replace it. Free.
No questions asked. No expiration date. No fine print.
Worst case: you don't love it and we make it right. Best case: you never think about buying a tee again.
Use size chart below for slightly relaxed fit.
For snug fit, size down.
Customer Reviews
Frequently Asked Questions
I Dare You To Ask…
Will it be comfy?
How can it be breathable AND durable?
What makes it odor/stink free?
Just normal washing?
What's so unique about DuraFlow™?
Why use hemp, bamboo, and cotton?
Lifetime warranty—really?
What makes it wrinkle-free?
How sustainable is this shirt?
What’s UndrDog’s big vision?