Use size chart below for slightly relaxed fit.
For snug fit, size down.

Size Chart

PageContent


  • scroll-strip-icon1

    Grips Arms
    And Shoulders

  • scroll-strip-icon2

    Hides Gut
    Look Healthy

  • scroll-strip-icon3

    Zero Chemicals
    No Synthetics

  • scroll-strip-icon4

    Get Compliments
    Feel Great

  • scroll-strip-icon5

    Lifetime Warranty
    Replace FREE

  • scroll-strip-icon1

    Grips Arms
    And Shoulders

  • scroll-strip-icon2

    Hides Gut
    Look Healthy

  • scroll-strip-icon3

    Zero Chemicals
    No Synthetics

  • scroll-strip-icon4

    Get Compliments
    Feel Great

  • scroll-strip-icon5

    Lifetime Warranty
    Replace FREE

  • scroll-strip-icon1

    Grips Arms
    And Shoulders

  • scroll-strip-icon2

    Hides Gut
    Look Healthy

  • scroll-strip-icon3

    Zero Chemicals
    No Synthetics

  • scroll-strip-icon4

    Get Compliments
    Feel Great

  • scroll-strip-icon5

    Lifetime Warranty
    Replace FREE

  • scroll-strip-icon1

    Grips Arms
    And Shoulders

  • scroll-strip-icon2

    Hides Gut
    Look Healthy

  • scroll-strip-icon3

    Zero Chemicals
    No Synthetics

  • scroll-strip-icon4

    Get Compliments
    Feel Great

  • scroll-strip-icon5

    Lifetime Warranty
    Replace FREE

  • scroll-strip-icon1

    Grips Arms
    And Shoulders

  • scroll-strip-icon2

    Hides Gut
    Look Healthy

  • scroll-strip-icon3

    Zero Chemicals
    No Synthetics

  • scroll-strip-icon4

    Get Compliments
    Feel Great

  • scroll-strip-icon5

    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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

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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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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
Not "low levels."
Not "within acceptable limits”
Not detected at all.

Oh, and the pH? Dead neutral (6.95). Your skin will never know the difference.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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 Taller

    Adds visual height and proportion. Clean tucked or untucked.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

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.

Trusted by 500,000 Men

See Oktoberfest Sale
  • Lifetime Warranty

  • Buy 3 = Free Shipping

EARTH'S LIFETIME TEE:
HEMP. BAMBOO. NO PFAS.
GRIPS ARMS. HIDES GUT.

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ass-seen-on

EARTH'S LIFETIME TEE:
HEMP. BAMBOO. NO PFAS.
GRIPS ARMS. HIDES GUT.

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1 in 100 Gets Free Gold Bar

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1-Pack

10% OFF

3-Pack

20% OFF

+ Free Shipping

6-Pack

30% OFF

+ Free Shipping

Choose Your Size
Snug fit = usual size, relaxed fit = size up

Select Pack

1-PACK

10% Off
1-pack

$41.50

$37.35

per tee

3-PACK

20% Off

truck Free Shipping

3-pack

$41.50

$33.20

per tee

6-PACK

30% Off

truck Free Shipping

6-pack

$41.50

$29.05

per tee

In stock: ready to ship
$41.50 $37.35
🎉 Oktoberfest Sale Savings auto-applied.

Pre-order your UndrDog Hemp to get the next available batch. Next batch ships:

July 22 SOLD OUT
October 08 94% SOLD
November 12 0% SOLD
Buy 3+ for FREE Shipping

Lifetime Warranty

Real gold. Real odds.

1 in 100 comes with
A FREE 1g gold bar

Gold Bar

1g of .9999 fine gold

Worth ~$200 (based on spot price)

Randomly inserted 1 in 100

Delivered straight in the order package

No purchase necessary, see details below

View Full Terms & Conditions

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?

Trusted by 500,000 Men
Become An UndrDog
Lifetime Warranty
Buy 3 = Free Shipping