Proof
72-Hour Merino T-Shirt - Slim Fit
72-Hour Merino T-Shirt - Slim Fit
Story
The ultimate travel tee
Our 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 it—and just it—for three-day camping trips to Bishop, California, with our Creative Director, Alex Souza, and then worn the same one underneath a blazer while on the road.
Features
- Made from a custom, Woolmark-certified merino wool blend sourced from Australia and New Zealand
- Naturally moisture-wicking, temperature-regulating, and odor-resistant for 72+ hours of non-stop wear
- UPF 30+ protection
Sizing
- The 72-Hour Merino T-Shirt has a slim fit through the chest and body. If you're looking for a looser or more casual fit, size up from your usual T-shirt size or try the 72-Hour Merino T-Shirt - Classic Fit
- Wool-based products will shrink slightly in a conventional washer and dryer, so we recommend cold/gentle washing and air drying, or taking the next size up to compensate
- For the absolute best personal fit, compare your body measurements to the chart below
Body Measurements
| XS | S | M | L | XL | XXL | 3XL | |
|---|---|---|---|---|---|---|---|
| Chest | 35 - 36 | 37 - 38 | 39 - 40 | 40½ - 42 | 42½ - 44 | 45 - 47 | 48 - 50 |
| Waist | 26 - 28 | 28 - 30 | 30 - 32 | 32 - 34 | 34 - 36 | 36 - 38 | 38 - 40 |
| Garment Body Length | 26¾ | 27¼ | 28 | 28¾ | 29½ | 30½ | 31½ |
All measurements are in inches.
How to Measure
- Body Chest: use a flexible measuring tape to measure under your arms around the widest part of your chest
- Body Waist: bend side to side to find your natural waist and measure around that point
- Front Length: measure on a shirt from the high shoulder to the bottom hem
Materials & Care
- 87% 16.5 micron merino wool, 13% nylon, 150gsm
- Made in China and Indonesia with wool sourced from Australia and New Zealand
- Sourced from industry leader Indorama, the specialized merino/nylon blend used in the 72-Hour Collection 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.
- Machine wash cold on gentle with mild detergent; tumble dry low or air dry to avoid shrinkage; do not use softener or bleach
About the 72-Hour Collection
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 adventure, it’s also our all-time bestselling tee for everyday wear.
The Sweat Test Guarantee
Put your new Proof gear through its paces. If it does not meet your expectations, we'll accept your dirty laundry and issue a refund, no questions asked.
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