"The softest shirts
I’ve worn"

-@irisclimbing-World Cup Climber, Team Finland · Harvard Engineering

Get Your: Iris x Ch*lk U tee!

↓ Full Testimonial Below ↓

soft shirts for climbers who found their people at the wall:

moves without fighting you

easy through warmups, reaches, and ofc the part where you pretend that fall was “just the beta.”

ridiculously soft

soft enough to make your old gym tee feel like cardboard with sleeves.

designed for climbers; without the cringe

insider designs for people who get the chalk, the mats, the weird jokes, and the post-sesh food runs.

New to Ch*lk U?

It’s not a $15 shirt with a climbing joke on it

but a $69 tee made to be the one you keep grabbing.

Why $69?

Here’s What Makes Our Shirts Different:

The Fabric:

Made with tri-blend fabric and oeko-tex® certified inks:

50% standard/recycled polyester
25% combed airlume ring-spun cotton
25% rayon

A soft, lightweight, broken-in feeling without the beat-up look.

The Fit:

Classic fit.
Unisex sizing.
Side-seamed construction.
Stretchy feel.
Loose-but-comfortable through the shoulders, chest, and torso.

Did someone say perfect?

The Movement:

No tugging.
No tightness.
No stiff fabric fighting you mid-session.

Just freedom of movement for climbing, warming up, and lounging between sends.

The Durability:

Pre-shrunk for extra durability.
In our internal testing,
print quality held up through 100+ washes!

When cared for as directed, these might just be your last surviving shirt.

The Care:

For longest-lasting softness and print quality:

Machine wash cold on permanent press,
Air dry/Line dry recommended,
Avoid bleach, and dry cleaning.

Like your favorite belay-buddy our shirts are easy peasy and no fuss.

btw... 14-day no-questions-asked returns.

try it on, feel it out, and make sure it earns a spot in your rotation.

Worn by climbers who get it.

Real sessions, real sends, real soft shirts. From the wall to everything after.

irisclimbing

halloween training session

View reel

mattgroom1

learning new skills

View reel

jaxon.wicks

another hard V9

View reel

ethan.cantclimb

tall beta break

View reel

carr_taishan

learning to be burly

View reel

mitchellshobbies

never the solution

View reel

irisclimbing

day in my life as a Harvard student

View reel

mattgroom1

few phone shots from Kharkiv

View post

jaxon.wicks

training day

View reel

carr_taishan

fun slab

View reel

hendersonclimbingteam

don’t fear the edge

View post

irisclimbing

halloween training session

View reel

mattgroom1

learning new skills

View reel

jaxon.wicks

another hard V9

View reel

ethan.cantclimb

tall beta break

View reel

carr_taishan

learning to be burly

View reel

mitchellshobbies

never the solution

View reel

irisclimbing

day in my life as a Harvard student

View reel

mattgroom1

few phone shots from Kharkiv

View post

jaxon.wicks

training day

View reel

carr_taishan

fun slab

View reel

hendersonclimbingteam

don’t fear the edge

View post

irisclimbing

halloween training session

View reel

mattgroom1

learning new skills

View reel

jaxon.wicks

another hard V9

View reel

ethan.cantclimb

tall beta break

View reel

carr_taishan

learning to be burly

View reel

mitchellshobbies

never the solution

View reel

irisclimbing

day in my life as a Harvard student

View reel

mattgroom1

few phone shots from Kharkiv

View post

jaxon.wicks

training day

View reel

carr_taishan

fun slab

View reel

hendersonclimbingteam

don’t fear the edge

View post

our collab shirt designed with the amazing climber Iris Heikkinen

**Iris x Ch*lk U:**

Shop the Drop

New to Ch*lk U?

Start Here

Shirts

Hoodies

Come for the wall.

Stay for the people.

At first, climbing was just something we tried.

Then the gym became the place we kept coming back to. We found friends, shared beta, cheered for strangers, and stayed way longer than we planned.

That's why Chlk U exists.
We make soft shirts for climbers who keep showing up, cheer each other on, and say Chlk U to anyone who says they can’t!

Our Story

Certifiably designed by humans.

None of our apparel is designed/made by AI, and never will.

While we believe at the end of the day AI is just a tool, and can be very useful at times; when it comes to creativity, AI can't replace it.

So finding out what we have is designed by a human either made you feel better or worse.

"Hands down the softest shirts I’ve worn, perfect for crushing climbs!"

-Iris Heikkinen- World Cup Climber for Team Finland, Harvard Engineering student, Marathoner.

Get Your: Iris x Ch*lk U tee!

"I’ve really enjoyed wearing the T-shirts.
They are a perfect combination of being soft and breathable, and feel great when climbing.
It’s a strange feeling, kind of like wearing water.
The designs are stylish and bold…my favorite is the blue colour, a bright, stylish look."

-Matt Groom- Olympic commentator, lead commentator for World Climbing/IFSC and UIAA Ice Climbing competitions.