72-Hour Merino T-Shirt - Classic Fit

Story

The ultimate travel tee

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 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 - Classic Fit offers more room in the chest and arms than the Slim Fit (Original) 72-Hour Merino T-Shirt. Take your usual T-shirt size
• Wool-based products may 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 best personal fit, compare your body measurements to the size 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

• Still not sure? Compare the measurements of one of your best-fitting shirts to the garment measurements below

Garment Measurements

	XS	S	M	L	XL	XXL	3XL
Chest	38	40	42	44½	47	50	53½
Shoulder	17	17½	18	18⅝	19¼	20	20⅞
Body Length	26½	27¼	28	28¾	29½	30½	31½
Sleeve Length	7⅞	8⅛	8⅝	9⅛	9⅝	10⅛	10⅝

All measurements are in inches.

How to Measure - Your Chest: Measure under your arms around the widest part of your chest, keeping the tape level across the front and back to get an accurate measurement - Your Waist: Measure around your waist where the top of your underwear sits - Garment Chest: Measure straight across from edge to edge, starting 1" below the armhole, multiply by 2 - Garment Shoulder: Measure straight across from shoulder seam to shoulder seam. Again, it’s easiest to measure across the back of the garment - Garment Body Length: Start at the top of the shoulder where it meets the neck seam, and measure straight down to the hem - Garment Sleeve Length: Start at the center of the back of the neck, measure straight across to the shoulder seam, and then follow the edge of the garment to the cuff. Pro tip: it’s easiest to measure across the back of the sleeve

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.

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