Use size chart below for slightly relaxed fit.
For snug fit, size down.
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Grips Arms
And Shoulders
Hides Gut
Look Healthy
Zero Chemicals
No Synthetics
Get Compliments
Feel Great
Lifetime Warranty
Replace FREE

Grips Arms
And Shoulders
Hides Gut
Look Healthy
Zero Chemicals
No Synthetics
Get Compliments
Feel Great
Lifetime Warranty
Replace FREE

Grips Arms
And Shoulders
Hides Gut
Look Healthy
Zero Chemicals
No Synthetics
Get Compliments
Feel Great
Lifetime Warranty
Replace FREE

Grips Arms
And Shoulders
Hides Gut
Look Healthy
Zero Chemicals
No Synthetics
Get Compliments
Feel Great
Lifetime Warranty
Replace FREE

Grips Arms
And Shoulders
Hides Gut
Look Healthy
Zero Chemicals
No Synthetics
Get Compliments
Feel Great
Lifetime Warranty
Replace FREE
HEAD TO HEAD
EVERY INTERNET
BLANK TEE
VS. UNDRDOG HEMP
Check the tag. It's all polyester. Different logo. Same plastic.
Material
Plastic on Skin
PFAS / Toxic Chemicals
Microplastic Shedding
Breathability
Odor Resistance
Durability
Fit Design
5-Year Cost
Guarantee

Hemp • Bamboo •
Organic Cotton
Zero. None

Zero

None - ever

DuraFlow™
Natural Airflow
Natural antimicrobial
at the fiber
Lifetime Warranty

Alpha Frame M for real men

$38 (once)

Lifetime.
No exceptions
EVERY INTERNET
BLANK TEE

Polyester
(petroleum plastic)
60–90% plastic fibers

Extremely common

Every single wash

Synthetic wicking only

Bacteria clings to plastic

6 months

Built for the model

$420-$750

30 days. Maybe.
Meet Our Founder
I USED TO SELL THE POISON I NOW FIGHT AGAINST. POLYESTER.
Hey! My name’s Chuckie.
I started UndrDog to build Earth’s strongest tee with a Lifetime Warranty. Hemp was the plan. Polyester was in the blend.
At the time, my wife and I were trying for a baby. Year after year, nothing. Went down the infertility rabbit hole.
Found Polyester, PFAS, and microplastics wrecked a man’s body.
I could’ve stayed quiet. Kept the checks coming.
I didn’t.
When you know better, do better. Shut the company down.
12 months. $300K. 37 prototypes later…
One worked. DuraFlow™.
Zero polyester. Zero synthetics. Lifetime Warranty. Last year, Shelby handed me our son, Charlie.
I made him a promise. He'd never wear what I used to sell.
Chuckie, Founder
























The Growth
500,000+ MEN
NOW WEAR PLANTS, NOT PLASTIC.
Hemp • Bamboo • Organic Cotton.
THE DETAILS
WHAT WE
OBSESSED OVER
Every detail analyzed. No compromises.
-
Stitch
Density -
Chemical
Free -
Fabric
Drape -
Odor
Prevention -
Durability
-
Hem
Curvature -
Airflow
Mesh -
Collar
Snapback -
Arm
Taper -
Gut
Hiding Fit -
Stretch
Recovery -
Wash
Durability
The Result?
The most over engineered blank tee ever created.
THE RECEIPTS
THIRD PARTY
LAB-TESTED
-
PFAS 'forever chemicals’
NOT DETECTED
-
Phthalates (9 Restricted Types)
NOT DETECTED
-
BPA, BPS, and BPB
NOT DETECTED
-
VOCS
NOT DETECTED
-
Banned Azo-Dyes
NOT DETECTED
-
Polyester & Hidden Synthetics
NOT DETECTED
Oh, and the pH? Dead neutral (6.95). Your skin will never know the difference.
PROOF
WE DON'T
MAKE CLAIMS.
WE DESTROY THEM.
We put UndrDog through tests other brands wouldn't dare try.
Test 1
The Fire Test
Polyester melts into toxic goo.UndrDog burns clean like a campfire. One's plastic. One's plants.
0 Polyester, 0 Plastic, 0 Chemicals
Test 2
The Fog Test
Blasted fog under both shirts. Polyester trapped it. Heat stays in. UndrDog? Fog flows straight through.
300% more breathable than cotton.
Test 3
BB Gun Test
Fired at a balloon inside each shirt. Other shirts? Shredded. UndrDog? Balloon survived.
4x stronger than cotton.
Test 4
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.
THE CUT
BUILT FOR REAL MEN
Not Models
We engineered the Alpha Frame™ so an average build looks solid. Grips where it should. Hides where it should.
-
Arms & chest:
Hugs Close.Makes the arms look bigger, the chest fuller.
-
Midsection:
Slightly Looser.Hides the gut and man-boobs without looking like a tent.
-
Curved Hem
Look TallerAdds visual height and proportion. Clean tucked or untucked.
THE OFFER
1 IN EVERY 100 SHIPS
WITH A REAL GOLD BAR
No gimmicks. No BS. We're literally putting solid 1g gold in real orders. Why? Because while fast fashion robs you, UndrDog rewards you. Buy a polo. You might strike gold.
-
1g of .9999 fine gold
-
Worth ~$200 (based on spot price)
-
Randomly inserted 1 in 100 orders
-
Delivered straight in the package
THE AIRFLOW
AIR GETS IN.
HEAT GETS OUT.
Bamboo is a hollow fiber. It leaves micro gaps in every stitch, and air moves straight through them. Lab tested for air permeability. A small breeze hits your skin like you're standing in front of a fan.
"I naturally run a bit hot, and couldn't believe how cool these shirts feel, they really do have great ventilation."
- Joshua H.
THE STRENGTH
4X STRONGER
THAN COTTON
Hemp is the strongest natural fiber on earth. We built the whole blank tee around it. Covered stitching. Triple-locked seams. Holds its shape wash after wash. Wear it for the next 30 years. If it ever fails, the Lifetime Warranty replaces it. No expiration. No interrogation.
"I've put mine through dozens of washes already, and they still look brand new;it's like wearing the durability of 10 normal cotton shirts in one."
- Jeffrey D.
THE SWEAT
300% MORE
SWEAT RESISTANT
DuraFlow™ pulls sweat off your skin and pushes it to the surface, where it evaporates. UndrDog is naturally antimicrobial, so the funk never starts. No pit stains by 10am. No smell on the drive home. Wear it two days straight. Nobody will know.
"After being able to spend the entire afternoon outside, doing yard work, sweating buckets. DIDN'T NEED TO CHANGE MY SHIRT once!"
- Jonathan C.
THE FIT
HIDE GUT &
MAN BOOBS
Alpha Fit. It holds close on the arms and chest, then eases off through the midsection. Arms look bigger. Chest looks fuller. The gut and man boobs stay out of the conversation. Midweight fabric keeps its shape all day, so nothing clings where it shouldn't. Look jacked at any size.
"I like the look on my Dad bod. I don't have to wear a hoodie to cover up the bulges anymore."
- Donald K.
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?
“My Go - To Gear To Keep
AS SEEN IN

