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2 for $130
Proof 72-Hour Merino Tee
Proof 72-Hour Merino Tee
Proof 72-Hour Merino Tee
Proof 72-Hour Merino Tee
Proof 72-Hour Merino Tee
Proof 72-Hour Merino Tee
Proof 72-Hour Merino Tee
2 for $130

72-Hour Merino T-Shirt in Navy

611 Reviews

Color: Navy

Size: Slim fit
Free U.S. Shipping $98+
Returnable within 30 days
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Merino wool men’s t-shirts that never itch and stay fresh no matter how many miles you put on them

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. As the ultimate travel t-shirt in our arsenal, it functions just as well as a merino wool base layer for adventures that call for packing light and staying comfortable. Even after three days of constant wear, the 72-Hour T-Shirt still pass the smell test thanks to the naturally odor-resistant and moisture-wicking properties of merino wool.

Bundle and Save: Buy 2 tees for $130. Discount applied directly at checkout.

  • Premium t-shirt 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 New Zealand farms (or as kiwis call ‘em, “stations”).

  • The 72-Hour Merino T-Shirt has a slim fit through the chest and arms
  • If you are between sizes or prefer a more relaxed fit, we recommend sizing up
  • If you love the fit out of the box, we'd recommend a cold, gentle wash and air drying or swapping out for one size larger to account for standard shrinkage that comes with machine washing/drying a wool-based product
  • For the absolute best personal fit, compare your body measurements to the chart below

Body Measurements

Chest 35 - 36 37 - 38 39 - 40 40½ - 42 42½ - 44 45 - 47 48 - 50
Garment Body Length 26¾ 27¼ 28 28¾ 29½ 30½ 31½
  • Machine wash cold
  • Tumble dry low or air dry to avoid any shrinkage
  • Do not bleach

The team at Proof created a performance tee that can be worn for 72 hours straight without showing any signs of wear—or, you know, odor. The 72-Hour Tee is built from the softest and strongest merino wool on the planet. To back up that claim, we’ve packed it 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, this temperature-regulating tee isn’t just for travel, it’s also our all-time bestselling tee for everyday wear.

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

“I wore this to Seattle and back and then up to Maine. Zero odor and still looked fresh.”

— Robert G. Verified Buyer

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