Shop All Seasonal Shops 72-Hour Collection
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72-Hour Merino UPF Hoodie
We call it the 72-Hour Collection because every piece is built with the comfort, durability, and odor-resistance to wear non-stop for three days or more. Just a little heavier than your average t-shirt, the UPF Hoodie is a go-to for sun protection in warm-weather...- $41.40
$138.00- $41.40
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Forest
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72-Hour Merino T-Shirt - Slim Fit
Our bestselling 72-Hour T-shirt is the merino tee, reinvented to help us go farther and pack lighter. Woven from a super-soft, Woolmark-certified merino wool blend, it naturally wicks moisture, regulates your temperature, and stays fresh even after 72+ hours of constant wear. We’ve packed...- $22.50
$75.00- $22.50
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Smoke Pine
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72-Hour Merino Chino - HB Athletic Tapered
Built for everyday life, with the range to travel and move when needed. The Proof team didn’t start with an off-the-shelf fabric. They spent two years working directly with their mills and factories to build a merino wool blend from the ground up—testing, refining,...- $28.50
$95.00- $28.50
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Navy
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72-Hour Merino T-Shirt - Classic Fit
Our bestselling 72-Hour T-shirt is the merino tee, reinvented to help us go farther and pack lighter. Woven from a super-soft, Woolmark-certified merino wool blend, it naturally wicks moisture, regulates your temperature, and stays fresh even after 72+ hours of constant wear. We’ve packed...- $18.30
$61.00- $18.30
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Deep Ocean
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72-Hour Merino T-Shirt - Classic Fit
Our bestselling 72-Hour T-shirt is the merino tee, reinvented to help us go farther and pack lighter. Woven from a super-soft, Woolmark-certified merino wool blend, it naturally wicks moisture, regulates your temperature, and stays fresh even after 72+ hours of constant wear. We’ve packed...- $21.00
$70.00- $21.00
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Grove Green
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Thermal 72-Hour Hoodie
The Thermal Hoodie is a new layer in our longstanding merino wool-based 72-Hour collection. Adventure-ready with a flattering fit, the layer’s primary point of differentiation from our existing 72-Hour hoodie is its double-knit waffle body. Built from a blend of merino wool and recycled...- $44.40
$148.00- $44.40
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Overcast
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72-Hour Merino T-Shirt - Slim Fit
Our bestselling 72-Hour T-shirt is the merino tee, reinvented to help us go farther and pack lighter. Woven from a super-soft, Woolmark-certified merino wool blend, it naturally wicks moisture, regulates your temperature, and stays fresh even after 72+ hours of constant wear. We’ve packed...- $26.40
$88.00- $26.40
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Falcon Heather
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72-Hour Merino Tactical Hoodie
We took the 72-Hour Hoodie’s signature merino and reinforced it with Spectra®, a fiber 15x stronger than steel used in everything from body armor to performance sailing lines to ultralight backpacks. Sticks and stones may break your bones, but they won’t put a hole...- $41.40
$138.00- $41.40
- Unit price
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Black
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72-Hour Merino T-Shirt - Classic Fit
Our bestselling 72-Hour T-shirt is the merino tee, reinvented to help us go farther and pack lighter. Woven from a super-soft, Woolmark-certified merino wool blend, it naturally wicks moisture, regulates your temperature, and stays fresh even after 72+ hours of constant wear. We’ve packed...- $19.80
$66.00- $19.80
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Haze Brown
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72-Hour Merino Tactical Tee
We took the 72-Hour Tee’s signature merino and reinforced it with Spectra®, a fiber 15x stronger than steel used in everything from body armor to performance sailing lines to ultralight backpacks. Sticks and stones may break your bones, but they won’t put a hole...- $16.20
$54.00- $16.20
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Light Chrome
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72-Hour Merino Chino - HB Straight
Built for everyday life, with the range to travel and move when needed. The Proof team didn’t start with an off-the-shelf fabric. They spent two years working directly with their mills and factories to build a merino wool blend from the ground up—testing, refining,...- $28.50
$95.00- $28.50
- Unit price
- per
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Black
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72-Hour Merino Chino - HB Straight
Built for everyday life, with the range to travel and move when needed. The Proof team didn’t start with an off-the-shelf fabric. They spent two years working directly with their mills and factories to build a merino wool blend from the ground up—testing, refining,...- $28.50
$95.00- $28.50
- Unit price
- per
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Olive
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72-Hour Merino T-Shirt - Classic Fit
Our bestselling 72-Hour T-shirt is the merino tee, reinvented to help us go farther and pack lighter. Woven from a super-soft, Woolmark-certified merino wool blend, it naturally wicks moisture, regulates your temperature, and stays fresh even after 72+ hours of constant wear. We’ve packed...- $22.50
$75.00- $22.50
- Unit price
- per
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Smoke Pine
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72-Hour Merino UPF Quarter Zip
We call it the "72-Hour Collection" because every piece is built with the comfort, durability, and odor-resistance to last three days of nonstop wear. Even more, the incredibly soft merino wool is infused with the strength of nylon to ensure it never shrinks in...- $41.40
$138.00- $41.40
- Unit price
- per
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Navy
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72-Hour Merino Boxer Briefs - 5"
These bestselling 72-Hour Boxer Briefs are crafted from Australian merino wool that’s infused with nylon to ensure it never shrinks in the washing machine. The ultimate boxer briefs in our arsenal, these are perfect for adventures that call for packing light and staying comfortable....- $13.50
$45.00- $13.50
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Carbon
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72-Hour Merino Boxer Briefs - 5"
These bestselling 72-Hour Boxer Briefs are crafted from Australian merino wool that’s infused with nylon to ensure it never shrinks in the washing machine. The ultimate boxer briefs in our arsenal, these are perfect for adventures that call for packing light and staying comfortable....- $13.50
$45.00- $13.50
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Stone Black
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72-Hour Merino UPF Hoodie
We call it the 72-Hour Collection because every piece is built with the comfort, durability, and odor-resistance to wear non-stop for three days or more. Just a little heavier than your average t-shirt, the UPF Hoodie is a go-to for sun protection in warm-weather...- $41.40
$138.00- $41.40
- Unit price
- per
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Navy
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72-Hour Merino UPF Quarter Zip
We call it the "72-Hour Collection" because every piece is built with the comfort, durability, and odor-resistance to last three days of nonstop wear. Even more, the incredibly soft merino wool is infused with the strength of nylon to ensure it never shrinks in...- $41.40
$138.00- $41.40
- Unit price
- per
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Charcoal Heather
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72-Hour Merino UPF Quarter Zip
We call it the "72-Hour Collection" because every piece is built with the comfort, durability, and odor-resistance to last three days of nonstop wear. Even more, the incredibly soft merino wool is infused with the strength of nylon to ensure it never shrinks in...- $41.40
$138.00- $41.40
- Unit price
- per
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Stone Black
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72-Hour Merino T-Shirt - Classic Fit (Tall)
Our bestselling 72-Hour Tee is woven from a super-soft merino wool blend that takes advantage of the material's all-natural performance, while also boasting long-lasting durability and machine-washable convenience. This high-performance shirt is built for everyday style, no-hassle travel, and casual days outdoors. Even after...- $26.40
$88.00- $26.40
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Black
