Use size chart below for slightly relaxed fit.
For snug fit, size down.
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The Silent Danger
Microplastics in Your Clothes
You’re wearing them every day, and they’re affecting you more than you think.
PFAs: The Chemical Time Bomb Hiding in Your Shirt
Most synthetic fabrics are treated with toxic PFAs that accumulate in your body.
Per- and polyfluoroalkyl substances (PFAs) are chemicals used in water-repellent fabrics and can cause severe long-term health issues such as:
Traditional shirts, made with polyester, contain PFAs, but the
UndrDog Hemp Shirt is FREE of these toxic chemicals.
Male Shrinkage & Fertility Drop
Man Up and Join the Fight
The Last Shirt You’ll Ever Need: Stronger, Healthier, and Safer
No more worrying about toxins, only the best for your body.
DuraFlow™ Hemp, Bamboo & Organic Cotton engineered for strength, airflow and softness.
Sustainable materials, built for comfort and durability.
Offers a lifetime warranty, ensuring long-term quality.
“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 fibres–No plastic
- Comfort Level: High comfort that lasts
- Fade-Resistant: Holds color, no fading
- Affordable: Out lasts 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.
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.
Durability, Comfort, and Sustainability, All in One Shirt
Built for Ultimate Durability and Performance
4X Stronger Than Cotton
Our fabric technology DuraFlow™ (patent pending) combines hemp and bamboo, providing unmatched toughness while maintaining comfort and performance.
Sweat-Wicking for All-Day Comfort
Stylishly Hides Gut & Man Boobs
No PFAs or Any Toxic Chemicals
"This shirt is next-level comfort. I wear it to work, gym, and weekends—can't believe it's made from hemp!" – Chris M.
Stylishly Hides Gut & Man Boobs
The fit smooths out your silhouette, giving you a sleek, confident look without feeling tight or restrictive.
No PFAs or Any Toxic Chemicals
Crafted without harmful chemicals like PFAs, so you can wear it with peace of mind.
"This shirt is next-level comfort. I wear it to work, gym, and weekends—can't believe it's made from hemp!" – Chris M.
“Cotton sucks. Hemp is a way better cloth. Way more durable. There’s nothing like it.”
The
Difference
We don’t just outperform our competitors. We outlive them.

Built for Life.
Backed for Life.
If it wears out, we replace it. No questions asked.
What The Guys
Have Been Asking
Will it be comfy?
Absolutely. The DuraFlow™ blend of hemp, bamboo, and organic cotton creates a midweight shirt with a higher GSM, designed for ultimate comfort. It’s breathable, soft, and fitted to enhance the male physique, gripping the body in all the right places to keep you feeling comfortable all day.
How can it be breathable AND durable?
UndrDog combined hemp’s unmatched durability with bamboo’s natural breathability. The result is a shirt that’s tough yet airy, so you stay comfortable no matter what.
What makes it odor/stink free?
Bamboo and hemp both possess natural antimicrobial properties that combat odors, while their moisture-wicking design pulls sweat away from the skin and allows it to evaporate, keeping you dry. No synthetic chemicals, just all-natural performance.
Just normal washing?
Yes, 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.
Why is “No PFAS & Microplastics” important?
PFAS and microplastics are proven toxins that never break down. Studies show they leach into your skin, bloodstream, and organs, increasing the risk of cancer, infertility, and even shrinkage of the penis and testicles. Over 20,000 studies confirm the harmful effects. Our tee is 100% free from these dangerous chemicals.
What's so unique about DuraFlow™?
DuraFlow™ is a breakthrough, patent pending technology and a world-first blend of hemp’s strength, bamboo’s breathability, and organic cotton’s softness.
The tri-blend design features a three-strand structure, which is stronger than a two-strand design because it provides even tension and is more stable than a four-strand design, where fibers can conflict.
This perfect balance locks in strength, durability, and breathability, making it the world’s strongest toxin-free tee, with a lifetime warranty. Designed for comfort, built to last.
Why this blend—hemp, bamboo, cotton?
Hemp gives unmatched strength, bamboo provides airflow and comfort, and organic cotton adds softness. Together, they create the most satisfying fabric for durability, breathability, and comfort.
Lifetime warranty—really?
Yes, really! Our tees are built to last a lifetime. If your UndrDog shirt is the wrong size or ever wears out, we’ll replace it with a brand-new one, free of charge. All you need to do is cover the small cost to send it back to us, and we’ll handle the rest. That’s our commitment to quality, ensuring you’re always covered.
What makes it wrinkle-free?
The hemp and bamboo blend naturally resists wrinkles, keeping your shirt looking sharp after a long day or a trip through the wash. The fibers hold their shape, so you don’t have to worry about ironing or ironing out those wrinkles.
How sustainable is this shirt?
100% sustainable. The materials are organic and eco-friendly. UndrDog takes a firm stance against toxic chemicals, microplastics, and unsustainable practices. Their hemp, bamboo, and organic cotton blend ensures minimal impact on the planet, while giving you a shirt that's good for you and future generations.
What’s UndrDog’s big vision?
To redefine the way men think about clothing. UndrDog is committed to creating the strongest, most comfortable shirts on the planet that don’t sacrifice sustainability, health, or performance. Their mission is to provide men with a lasting solution to cheap fast fashion, offering stylish, eco-conscious shirts that stand the test of time.
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Durability ExcellenceStrong, tear-resistant, and built to last. -
Breathability & ComfortKeeps you cool, dry, and comfortable. -
SustainabilityEco-friendly, pesticide-free, and made with recycled materials. -
Advanced PerformanceMoisture-wicking, UV protection, and hypoallergenic. -
Style ExcellenceModern fit with a flattering, athletic cut.