Men’s Merino Wool Shirts | Button-up, Polos & Tees

Q: Is Merino actually itchy?

Not ours. The reason traditional wool itches is fibre thickness — coarse fibres poke the skin instead of bending against it. We use superfine Australian merino, which bends like cotton. If yours feels uncomfortable in the first wear, we'll refund it. Full stop.

Q: How often do I actually need to wash it?

Most owners wash every 5–10 wears. Hang it overnight in a steamy bathroom or open air — odour disappears, wrinkles drop. Spot-treat any stains. Machine wash cold on wool cycle when needed, lay flat to dry.

Q: Does it work in hot weather?

Better than cotton, honestly. Merino wicks moisture off your skin and releases it through the fibre — it's why desert nomads wear wool, not cotton. Stays cool in heat and warm in cold without ever feeling clammy.

Q: What if it doesn't fit?

Free returns within 30 days, no questions asked. Most buyers find our fit runs true to size, slim-regular through the chest. Check the size chart with full garment measurements on each product page, or email us your height and weight and we'll recommend.

Sir W. founder, Jock, at his farm with Merino rams

THE MOST COMFORTABLE SHIRTS

Shop the Starter Set → Shop Merino →

LUXURY BY NATURE

Heritage

140 years of growing Merino wool in Australia.

LIFESTYLE

We combine classic design with modern functionality.

QUALITY

Our garments are a testament to dedication and excellence.

Proudly Woolmark Certified

THE BUTTON-UP FOR EASY TRAVEL

Our shirts don't require regular washing. Just pack and go.

FRENCH BLUE

CARAMEL

POPPY RED

OLIVE GREEN

ODOUR-FREE WORKOUT TEE

Five workouts. No smell tomorrow.

Shop The Cassius →

A man wearing a gray t-shirt and white shorts stands in front of a black power rack in a home gym setting, gesturing with his hand. The rack is loaded with weight plates and has a Captain America shield hanging on the wall behind it.

"I stretched it to 7 wears. No smell"

"I put this shirt through my own test of 5 dripping wet sweat training sessions...

No washing. Each time I would go back to wear it and it was just as fresh as the first time I wore it.

I stretched it to 7 wears. No smell." - Brett B.

SHOP THE CASSIUS

NATURE TESTED FOR 365 DAYS

SHOP NOW

Forget the plastic shirts you've had before. Merino will change your game.

Signature Sir W. Merino

The Bruce - The Travel Button-Up

$125 USD

(5.0)

Black and shadow Sir W. Merino t-shirts on hangers

The Cassius- Merino Athletic Tee

$90 USD

(5.0)

Sir W. Merino Royal Blue polo shirt on a wooden hanger against a beige background #Color_Royal Blue

The George- All Day Merino Polo

$110 USD

(5.0)

View all

Sir W. founder, Jock, inspecting a Merino fleece

— Our Heritage

MERINO WOOL SINCE 1880.

In 1880, George Merriman purchased a small flock of Merino sheep. This was the beginning of a family legacy now over a century long.

In 1903, his son and my great-grandfather, Walter Merriman received a portion of that flock for his twenty-first birthday. From that small beginning, he built one of Australia's most respected Merino studs, was knighted by the Queen of England — and many generations later, we still graze the same bloodline of sheep.

Sir W. exists to share that wool with the rest of the world. As a proper, better way to dress through life.

— Jock Merriman

Fifth Generation Woolgrower · Founder

Read the full story

Sir W. founder wearing Bruce with Merino sheep

BUILT BY NATURE

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Sir W. founder in Europe wearing Bruce button down

TWO WEEKS IN EUROPE- 3 SHIRTS.

I traveled from Austin to Milan → Bellano → Impruneta → Bologna → Dublin → a castle in Kildare. Fourteen days, three climates, one carry-on — two Bruces and a Cassius, and not a single wash.

Find Out How

THE BEST SHIRTS YOU CAN BUY

Hands Down the Best Athletic Tee!!!

"I have gone through tons of shirts that get thrown away because they stink.

I put this shirt through my own test of 5 dripping wet sweat training sessions. Each time I had to ring the shirt out it was so wet. Each time I would hang it up to dry. No washing.

Each time I would go back to wear it and it was just as fresh as the first time I wore it. I stretched it to 7 wears. No smell. Best Athletic Tee EVER. Thanks Jock!"

- Brett B

"I recently bought this shirt after having the George shirt for over a year. It’s a great shirt for workouts or to wear for casual social events when the weather is super hot or humid. It sounds crazy but it doesn’t smell when you sweat in it so it’s perfect for summer and workouts!"

Tommy C.

"The Cassius is such a nice shirt. My husband loves the feel and he can workout in it and there’s no odor at all!"

Christi F.

"Love this shirt, I wear it everywhere. It can dress up or down and requires very little washing."

Jack N.

"Bought as a gift and is highest quality, elegant, and makes him look distinguished!"

Elizabeth L

The Sir W. Story

1880

The first Merino sheep are purchased by George Merriman (Sir Walter's father).

1903

Walter Merriman acquires his first sheep flock at age 21 and begins his stud.

1954

The Queen of England knights Walter to become a 'Sir Walter Merriman' for contributions to the Australian Sheep Industry.

2022

After 142 years of wool, Jock launches Sir W. — clothing direct from sheep to shoulders.

Need help?

Frequently Asked Questions

Is Merino actually itchy?

Not ours. The reason traditional wool itches is fibre thickness — coarse fibres poke the skin instead of bending against it. We use superfine Australian merino, which bends like cotton. If yours feels uncomfortable in the first wear, we'll refund it. Full stop.

How often do I actually need to wash it?

Most owners wash every 5–10 wears. Hang it overnight in a steamy bathroom or open air — odour disappears, wrinkles drop. Spot-treat any stains. Machine wash cold on wool cycle when needed, lay flat to dry.

Does it work in hot weather?

Better than cotton, honestly. Merino wicks moisture off your skin and releases it through the fibre — it's why desert nomads wear wool, not cotton. Stays cool in heat and warm in cold without ever feeling clammy.

What if it doesn't fit?

Free returns within 30 days, no questions asked. Most buyers find our fit runs true to size, slim-regular through the chest. Check the size chart with full garment measurements on each product page, or email us your height and weight and we'll recommend.

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These are the best shirts! I bought a couple for my husband and he loves them. Very good quality and easy to care for- you don’t have to wash after every wear because they don’t hold odor. He wears them with shorts, jeans, khakis… they are so versatile. This was a great purchase and I highly recommend these shirts!

Great shirt for travel in a variety of climates & settings.

Went from the Hoover Dam to Five Star Dinning in this shirt. Breathable. Odor-resistant. Comfortable. Versatile.

Just got the white one. Material is quality but nearly sheer and the tag near the neck is dark and totally see-through from the outside. And on the left sleeve is a very gaudy “Sir W Merino” embroidered in, which is totally not evident from the pics of the shirt on the site. Would not have bought based on these two tag/advertisement issues.

I had no idea clothing could be so comfortable. I put on the shirt I ordered from Sir W Merino and I was absolutely amazed at how incredibly awesome it was! I’ve worn LOTS of different kinds of clothing in my life, but I’ve never worn anything as comfortable as the shirt I got from Sir W. Merino! I will definitely be back for more!

I wish I could give Sir W. Merino six stars out of five! Fit and finish is second to none, extremely comfortable, and absolutely exceptional customer service! Thank you, Jock! I love Sir W Merino!!

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Sir W. Merino

SHIRTS THAT WORK WITH YOU, NOT AGAINST.

THE BUTTON-UP FOR EASY TRAVEL

Signature Sir W. Merino

THE BEST SHIRTS YOU CAN BUY

The Sir W. Story

Frequently Asked Questions

Let customers speak for us