Use size chart below for slightly relaxed fit.
For snug fit, size down.
IndexContent
Earth’s Greatest Fitting Black Tee
THE HEMP & BAMBOO BREATHABLE TEE THAT LASTS LONGER THAN YOUR MORTGAGE
Without toxic PFAS ☠️ Forever-Chemicals
No PFAS
No Polyester, No Microplastics
Breathable
Bamboo's Superpower
Comfortable
Satisfyingly Soft
Hides Gut
Grips High, Loose Below
Durable AF
Hemp Strength
Lifetime Warranty
Buy Once, Wear for Life
Hey, I’m Chuckie!
Founder of UndrDog Hemp.
Making the World's Strongest Shirt
I had one goal - to create the World’s Strongest Shirt with a Lifetime Warranty.
Also, fit to grip my biceps and hide the gut.
Hemp was the answer, right? Earth’s toughest fabric.
But 100% hemp shirts were like wearing cardboard. Not comfortable, breathable, or practical for real life.
The Search for Perfection
I needed something durable, breathable and comfortable.
First attempt… I blended hemp with polyester.
BOOM. I created the world’s strongest shirt with a lifetime warranty.
It wasn’t super breathable, but UndrDog Hemp took off. Success!
But then, everything changed.
The Wake-Up Call
After four years of trying to have a baby with my wife, I researched why things weren’t working.
I came across something linked to infertility that I didn’t expect to see: Polyester.
Specifically, the PFAS chemicals it contains. Studies link them to lower testosterone, infertility and other serious health risks.
Research says wearing polyester leeches toxic microplastics straight into our bloodstream.
The Pivot
I had a choice: keep selling toxic shirts like everyone else, or fix it.
I chose to do better.
I went back to the drawing board with one question…
How to make a strong, breathable and comfy shirt with a lifetime warranty WITHOUT toxic chemicals.
Goodbye Polyester, hello Bamboo!
It breathed like a dream, airflow-heaven, soft and comfy, but it was weak.
So I thought,
“Why not combine Hemp’s strength and Bamboo’s breathability?”
No method existed to blend these two magic fibers successfully. So, we created the technology.
After almost a year of trial and error, we created something that had never been done before.
Enter: DuraFlow™ – our innovative, patent-pending technology blending hemp, bamboo, and organic cotton.
The most satisfying midweight shirt - Durable, breathable, and comfortable. Like a man-hug without feeling weird.
The Forever Tee Without Forever Chemicals
Durable:
Hemp strength and shape retention.
Breathable:
Stay cool, no sweat pits or odor.
No Toxic Chemicals:
PFAS-free from seed to shirt.
Lifetime Warranty:
Built to last. No more fast-fashion trash.
Sustainable:
Made from 100% eco-friendly materials that protect our planet.
Comfortable:
Most satisfying shirt you’ll experience.
That's how the Forever Tee was born. A shirt that won’t fall apart, won’t poison you, doesn't cost a fortune, or needs replacing!
Plus, a fit sculpted to make you look f’ing jacked.
Hides Gut & Man Boobs
“UndrDog shirts high-five every muscle; even your shadow will flex and turn people on”
Hemp’s firm resilience clings to your body in all the right places.
Unbeatable Breathability
“UndrDog Shirts don't just breathe; they give air permission to pass through.”
Stay cool with Bamboo's natural breathability airflow.
4x Stronger Than Cotton
“When your UndrDog shirt enters the wardrobe, cotton shirts unravel themselves in fear.”
High-tensile hemp makes this shirt almost indestructible.
300% More Sweat Resistant than Ordinary Cotton Tees
“UndrDog shirts don’t just resist sweat; they make it evaporate in awe.”
Hemp creates a natural barrier that is moisture-wicking (keeping you dry and smelling better than you should).
What Exactly Is It?
Engineered with our DuraFlow™ Tech (patent pending)
51% Hemp. 31% Bamboo. 18% Organic Cotton.
Hemp = 4x stronger than cotton
Bamboo = breathable + anti-stank
Cotton = just enough softness to keep it cozy
Absolutely zero:
Polyester
PFAS
Microplastic shedding
Endocrine-disrupting garbage
We Don't Make Claims.
We Destroy Them.
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. That's DuraFlow™ — it moves moisture out instead of trapping it in. No sweat patches. No stink. No soaked-through look by noon.
Guaranteed for life.
Why UndrDog Hits Different
Other brands sell 20 shirt styles.
We sell one. Because one is enough when it’s built right.
We obsessed over:
- Stitch density
- Fabric drape
- Hem curvature
- Arm taper
- Stretch recovery
- Collar snapback
- Chemical-free softness
- Durability
- Airflow mesh
Result?
A shirt that will give you insane levels of confidence and change how you carry yourself.
Why You Actually Need This
You think your shirts are fine… until you put this one on. Then suddenly you’re wondering:
“Why doesn’t anything else fit like this?”
“Why do my other tees smell like mildew after one wear?”
“Wait… are my arms actually bigger or is it the cut?”
Spoiler: It’s the cut.
This tee does more for your confidence than your protein powder does.
What to Expect
Day 1
You’ll put it on and get a “Damn, you lift?” even if you don’t.
Week 1
It’s your go-to. No stink. No sag. Compliments incoming.
Month 1
You’ve washed it 5x. Still looks brand new. You’ve thrown out 4 cotton shirts.
Year 1+
It’s still your favorite. Still holding shape. Still outperforming everything else in your closet.
Did you know?
Before it got banned in the 1930s, hemp powered 80% of clothing—strong, sustainable, unmatched.
Then, in a blink…
Hemp was sidelined, victim to political greed and propaganda.
Their motive?
Kill hemp, boost profits from cotton, timber, and synthetics–Now three of the world’s most polluting industries!
Their Playbook Used From The 1930’s Until The Tables Turned In 2018 and today:
17th-18th Century
Hemp's Golden Era: Fuels 80% of World's Textiles, Shipbuilding, and Exploration.
1935
George W. Schlichten patented first hemp decorticator machine to improve hemp processing.
1936
Anti-hemp propaganda launches to protect synthetic industry interests.
1937 Marijuana Tax Act
Penalizes hemp, crippling potential.
1970 Controlled Substances Act
Wrong classification sidelines benefits.
1980s-1990s
Legal restrictions overshadow eco-advantages.
2018 Farm Bill
Legalizes hemp, acknowledging safety and versatility.
2024: Undrdog
Boldly elevating men's fashion with premium shirts to restore hemp's heritage.
Lifetime Warranty:
Buy Once, Wear For Life
The average man spends $180 a year on fast-fashion cotton trash. Smart men choose quality over quantity.
- Ages like fine whiskey
- Holds shape for 30+ years
- No expiry date - refund anytime
“I sweat a lot and this shirt wicks the sweat away, breathes well and isn’t too hot. It keeps its shape and never smells bad. Best shirt ever! Ordering 2 more!”
“Hemp is legit! Insanely breathable, soft, durable, and somehow hides my gut” - Daryn T.
UnderDog Hemp: 51% Hemp, 31% Bamboo, 18% Organic Cotton
No PFAS, microplastics or cancerous chemicals.
Crafted with DuraFlow™ tech - blends hemp’s strength and bamboo’s breathability into a satisfying forever-shirt without forever-chemicals.
- Weight: Midweight comfort with max airflow
- Stronger Wear: 4x stronger than cotton
- Super Breathable: Stay cool with Bamboo airflow
- Moisture-Wicking: Draws sweat, stay dry
- Holds Shape: No sag or stretch for 30 years
- Wrinkle-Resistant: Easy low maintenance
- Eco-Smart: All natural fibers–No plastic
- Comfort Level: High comfort that lasts
- Fade-Resistant: Holds color, no fading
- Affordable: Outlasts 10 ordinary tees
- Sun-Safe: Natural UV protection
- Hypoallergenic: Allergy & irritation-free
- Fit: Perfectly tight on the arms and chest, loose around the gut. Look jacked regardless of your size.
- For a slightly relaxed fit, we recommend using your usual size. For a snug fit, size down.
Just wash and dry it like any other shirt—no special care needed. The fabric's durability and shape retention stay strong, even after multiple washes and machine drying on low heat.
Don’t like the fit? Don’t like the material? Simply contact support@undrdoghemp.com for an easy return. Unmatched Lifetime Warranty. Yep… we’re that cocky confident.
This is “Project 001: Midnight”. The only project available to the public. It’s UndrDogs’ Coat-of-Arms. After purchase, you’ll join thousands in the Undrdog collective with unlocked access to future ‘limited edition’ projects (different colors, styles, designs, etc).
Use size chart below for slightly relaxed fit.
For snug fit, size down.
Real gold. Real odds.
1 in 100 comes with
A FREE 1g gold bar
1g of .9999 fine gold
Worth ~$200 (based on spot price)
Randomly inserted 1 in 100
Delivered straight in the shirt package
No purchase necessary, see details below
View Full Terms & Conditions
Customer Reviews
UndrDog's 5 Quality Checks
Thanks to innovative DuraFlow™ Technology
Breathability & Comfort
- Breathable: Optimized airflow design
- Odor Resistant: Antibacterial properties
- Midweight: Instant satisfying comfort
- Softness: Lasting Hemp-bamboo comfort
Durability Excellence
- Durable: Hemp strength + Midweight GSM
- Heavy Duty: Extra double-stitched hems
- Tough: Resists tearing and abrasion
Earth-Friendly & Sustainable
- Eco-Friendly: No polyester, biodegradable
- Anti-Pollution: Clean land, air & oceans
- PFAS-Free: Chemical-Free, sustainable
Advanced Performance
- Shape Stable: No sag, stretch or shrink
- Wrinkle Free: Drys so no ironing needed
- Skin-Safe: UV protection & hypoallergenic
Style Excellence
- Tailored Fit: Grips up high, loose below
- Modern Look: Curved front & bottom hem
- Identity: Recognizable brand emblem
Due To Scarcity of Hemp, We Are Only Adding 6,837 Total New Customers In March.
This ensures the highest-quality hemp for the Undrdog collective (you).
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?
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