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Proof 72-Hour Merino LS Tee
Proof 72-Hour Merino LS Tee
Proof 72-Hour Merino LS Tee
Proof 72-Hour Merino LS Tee
Proof 72-Hour Merino LS Tee
Proof 72-Hour Merino LS Tee

72-Hour Merino Long Sleeve Tee in Black

105 Reviews
$92

Color: Black

Size: 
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XXL
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Merino wool long sleeve shirt that never itches and stays fresh no matter how many miles you put on it

Our bestselling 72-Hour collection is crafted from a New Zealand merino wool that’s infused with nylon to ensure it never shrinks in the washing machine. The ultimate travel shirt in our arsenal, it does just as well as a merino wool base layer as it does on its own as a casual long sleeve shirt—perfect for adventures that call for packing light and staying comfortable. Even after 72+ hours of constant wear, it’ll still pass the smell test thanks to the naturally odor-resistant and moisture-wicking properties of merino wool.


  • Premium long sleeve tee with a stylish cut that combines comfort with technical performance
  • Engineered fabric harnesses the incredible natural properties of merino wool to wick moisture, resist odors, and regulate temperature
  • Nylon reinforcement allows the merino fabric to be machine washed while retaining its shape for easy care throughout the life of the garment
  • Made in Indonesia with 16.5 micron wool sourced from New Zealand
  • 87% 16.5 micron merino wool, 13% nylon
  • Temperature regulating
  • Odor-resistant
  • Moisture-wicking
  • Machine washable

Sourced from industry leader Global Merino, the specialized merino/nylon blend used in the 72-Hour Merino Tee is the cutting edge of technical fabrics that doesn’t sacrifice comfort for performance. It not only takes advantage of the amazing natural properties of wool, but strengthens them with nylon for a truly impressive fabric. Sustainably sourced from three New Zealand farms:

  • Glenbrook Station, Twizel, NZ 44.2599° S, 170.1043° E
  • Ben Omar Station, Omarama, NZ 44.4880° S, 169.9669° E
  • Dunstan Peaks, Omarama, NZ 44.4808° S, 169.9533° E
  • The 72-Hour Merino Tee has a slim fit that’s true to size, take your normal size
  • If you are between sizes, we recommend the larger size
  • If you prefer a roomier fit, size up
  • For the absolute best personal fit, measure one of your best fitting tees and compare to the garment measurements below

Garment Measurements

XS S M L XL XXL
Chest 37 39 41 43 45 48
Shoulder 16 16¼ 16¾ 17¼ 17¾ 18½
Sleeve: Shoulder to Sleeve Opening 25 25½ 26 26½ 27 27½
Body Length: High Shoulder to Bottom 26¾ 27½ 28¼ 29 29¾ 30¾
  • Machine wash cold
  • Tumble dry low
  • Do not bleach

The team at Proof created a collection of performance shirts that can be worn for 72 hours straight without showing any signs of wear—or, you know, odor. The 72-Hour collection is built from the softest and strongest merino wool on the planet. To back up that claim, we’ve packed a merino wool layer as our only shirt on demanding excursions around the world—from Iceland and the Swiss Alps, to Mexico City and even our own backyards. Turns out, these temperature-regulating styles aren't just for travel, they're also our all-time bestsellers for everyday wear.

Email us at [email protected] for sizing guidance or other questions.

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