INTRODUCING

000: CLEAN SLATE
000: Clean Slate tee 000: Clean Slate tee
  • 51% Hemp
  • 31% Bamboo
  • 18% Organic Cotton
  • 0% Chemicals
★★★★★ 4.7 (1198 reviews)

Project 000: Clean Slate

Made with PATENT-PENDING DuraFlow™

Project 000: Clean Slate
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USA Today Logo
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★★★★★ 4.7 (1198 reviews)

Project 000: Clean Slate

Made with PATENT-PENDING DuraFlow™

My go-to-gear!

"My favorite gear for keeping microplastics away from my skin. It is incredibly comfortable, tough, airy and backed by a lifetime warranty."

Dave Asprey

Dave Asprey

The Father of Biohacking

1 in 100 Gets Free Gold Bar
Select Pack: 1-pack • $41.50/shirt
1 in 100 wins a gold bar
Choose Your Size:
Snug fit: pick your usual size. Relaxed fit: go one size larger
Buy 3+ for FREE Shipping

Lifetime Warranty
Material + −

UnderDog Hemp: 51% Hemp, 31% Bamboo, 18% Organic Cotton

No PFAS, microplastics or cancerous chemicals.

Crafted with DuraFlow™ technology, which merges the toughness of hemp with the airiness of bamboo for a deeply satisfying forever-shirt, minus the forever-chemicals.

  • Weight: Midweight comfort with max airflow
  • Stronger Wear: 4x stronger than cotton
  • Super Breathable: Stay cool with Bamboo airflow
Size & Fit + −
  • Fit: Close-cut through the arms and chest, roomy over the stomach. You look muscular whatever your build.
  • For a snug fit, go with the size you normally wear. Want it looser? Order one size up.
Washing + −

Launder and dry it the way you would any ordinary tee, with no special care required. The fabric stays durable and keeps its shape through repeated washes and low-heat tumble drying.

Lifetime UndrDog Warranty + −

Unhappy with the fit or the feel of the fabric? Just email contact@undrdogclothing.com for an easy return. Unmatched Lifetime Warranty.

Other Colors Available? How Does UndrDog Work? + −

This is “Project 000: Clean Slate”. It is the one project open to everyone, and it carries the UndrDogs’ Coat-of-Arms. Once you buy, you become part of the Undrdog collective of thousands and get access to future ‘limited edition’ projects.

×

Check the size chart below if you want a slightly looser fit.
Want it snug? Order a size smaller.

Size Chart
×

REAL GOLD. REAL ODDS.

1 in 100 comes with A FREE 1g gold bar

Gold Bar

✓ 1g of .999 fine gold

✓ Worth ~$200 (based on spot price)

✓ Randomly inserted 1 in 100

✓ Delivered straight in the order package

View Full Terms & Conditions

000: CLEAN SLATE

Before everything, there was nothing.

No color.
No color.
No chemicals.
No chemicals.
No compromise.
No compromise.

Just raw truth.

This is Project 000.

It’s not a number. It’s a mindset. Your reset button.

Live clean, wear clean.

The world's first
no-dye hemp &
bamboo tee.

000 Clean Slate Tee

The world's first no-dye hemp & bamboo tee.

No color process.
No pigments.
No treatments.

Just pure, unprocessed DuraFlow™ in its natural state.

This is what natural fabric looks like before the world touches it.

Clean Slate Hero
For men ready to cut the nonsense and begin fresh.

For men ready to cut the nonsense and begin fresh.

New chapter. New standards. New you.

Making a statement takes no color.

You need substance.

This is Earth's purest tee. Period.

No PFAS.
No plastic.
No dye.
No excuses.
Clean Slate Shirt

Same UndrDog
Hemp Material

Same Compliments
and Swag

Only Difference -
No Color

Same Chislled
Shape & Fit

Same Lifetime
Warranty

Trusted by 500,000+ Men
See Halloween Sale
Lifetime Warranty
Buy 3 = Free Shipping
Crew

Earth’s Most Satisfying Midweight Tee

THE HEMP & BAMBOO BREATHABLE TEE THAT LASTS LONGER THAN YOUR MORTGAGE

Without toxic PFAS ☠️ Forever-Chemicals

DuraFlow™
Hemp/Bamboo
Material

Same Non-PFAS
Microplastic
Poison

Same Compliments
and Swag

Same Alpha
Chiseled Fit

Same Lifetime
Warranty

Only Difference?
No-Dye Color

Trusted by 500,000+ Men
Get Your First Tee
Lifetime Warranty
Buy 3 = Free Shipping
1 in 100 wins FREE GOLD BAR
The Offer

1 in Every 100 Include A Real Gold Bar

No tricks. No nonsense. We are quite literally handing out solid 1g gold to real customers. The reason: fast fashion takes from you… UndrDog gives back. Grab a tee and you could hit the jackpot!

1g of .999 Fine Gold

Worth ~$200 (Based On Spot Price)

Randomly Inserted 1 in 100 Orders

Delivered straight in the Order package

1 in 100 wins FREE GOLD BAR

Engineered with our DuraFlow™ Tech (patent pending)

51% Hemp. 31% Bamboo. 18% Organic Cotton.

Check

Hemp = 4x stronger than cotton

Check

Bamboo = breathable + anti-stank

Check

Cotton = just enough softness to keep it cozy

Absolutely zero:

Cross

Chemical dye

Cross

Polyester

Cross

PFAS

Cross

Microplastic shedding

Cross

Endocrine-disrupting garbage

Lifetime Warranty:
Buy Once, Wear For Life

Most men spend $180 each year on throwaway fast-fashion cotton. Sharp guys pick quality rather than quantity.

  • Ages like fine whiskey
  • Holds shape for 30+ years
  • No expiry date - refund anytime

“I sweat heavily, and this shirt pulls moisture off me, lets air through and never feels stifling. It holds its shape and doesn’t pick up odors. Greatest shirt I own! Getting 2 more!”

James C.

Verified Review
Lifetime Warranty: Buy Once, Wear For Life
Trusted by 500,000+ Men
See Halloween Sale
Lifetime Warranty
Buy 3 = Free Shipping

Customer Reviews

4.7
★★★★★
Based on 1,198 Reviews
5 ★
(992)
4 ★
(92)
3 ★
(57)
2 ★
(16)
1 ★
(41)
Customer photo 1 Customer photo 2 Customer photo 3 Customer photo 4 Customer photo 5 Customer photo 6 Customer photo 7 Customer photo 8

Ask a Question

Write a Review

K
Keith Verified by Shop
US Flag United States
10/26/2026
★★★★★
Super comfy shirts. When I sweat in them they dry fast, and my underarms don’t stay wet and clammy the way they did in my polyester shirts. I plan to buy extras as presents for family and friends.
PM
Phil M. Verified Buyer
US Flag United States
10/26/2026
★★★★★

My experience

Good shirts. They feel solidly made and the warranty is unbeatable, though I hope I never need it.
D
David Verified by Shop
US Flag United States
10/26/2026
★★★★★
Swapping every one of my tees for UndrDog, my go-to brand!
D
Daniel Verified by Shop
US Flag United States
10/26/2026
★★★★★
Love these shirts. Really happy I picked them up
JA
Jeremy A. Verified Buyer
US Flag United States
10/26/2026
★★★★★

Excellent T-shirt

Underdog showed me how different a well-made t-shirt feels
T
Todd Verified by Shop
US Flag United States
10/25/2026
★★★★★
great product and company.
WB
Walter B. Verified Buyer
US Flag United States
10/25/2026
★★★★★

Great shirt!

Doing well so far. The fit is great, there is some stretch, and it feels like genuinely good material.
GM
George M. Verified Buyer
US Flag United States
10/25/2026
★★★★★

Unexpected surprise

I tried these out and got a top-quality product in return. What I like most is that they feel nearly weighty when held, yet wear so comfortably.
SS
Stephen S. Verified Buyer
US Flag United States
10/25/2026
★★★★★

Best T-shirt

Great look, perfect fit. The best tee I have owned.
DB
Douglas B. Verified Buyer
US Flag United States
10/25/2026
★★★★★

Perfection

Best tees and grunders I've ever owned
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Frequently Asked Questions
I Dare You To Ask…

Will it be comfy?

Yes. DuraFlow™ mixes hemp, bamboo and organic cotton into a midweight, higher-GSM shirt built with maximum comfort in mind. It breathes, feels soft and has a cut that flatters the male build, hugging the body exactly where it should so you stay comfortable from morning to night.

How can it be breathable AND durable?

What makes it odor/stink free?

Just normal washing?

What's so unique about DuraFlow™?

Why this blend—hemp, bamboo, 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