72-Hour Merino T-Shirt - Classic Fit

Story

The merino t-shirt, reinvented—go farther, pack lighter, and skip the laundry for days

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 72+ hours of constant wear, it’ll still look on-point and pass the "sniff test" thanks to the naturally odor-resistant and moisture-wicking properties. Our community has wear-tested these tees everywhere from the streets of Tokyo to the trails here in Austin, and we can’t wait to hear where you take yours.

Features

• Made from the world’s best merino wool
• Naturally moisture-wicking and temperature-regulating
• Odor-resistant for 72+ hours of non-stop wear
• Super-soft feel that’s never itchy
• Rated UPF 30+ for sun protection
• Woolmark certified for meeting the highest standards of quality, durability, and performance

Sizing

• The 72-Hour Merino T-Shirt - Classic Fit gives you more room through the chest and arms than the Slim Fit (Original) 72-Hour Merino T-Shirt, take your normal t-shirt size
• Wool-based products will shrink slightly in a conventional washer and dryer, so we recommend either 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 cycle
• Tumble dry low or air dry to avoid any shrinkage
• Use delicate/mild detergent
• Do not use softener
• Do not 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.