72-Hour Merino Tactical Tee

Story

A tougher, abrasion-resistant version of our 72-Hour T-Shirt—built for rucking, lifting, and getting after it

We took the 72-Hour Tee’s signature merino and reinforced it with Spectra®, a fiber 15x stronger than steel used in everything from body armor to performance sailing lines to ultralight backpacks.

Sticks and stones may break your bones, but they won’t put a hole in this tee—and neither will barbells, rucksacks, or any other type-two fun you throw at it.

You still get all the merino magic—moisture-wicking, temperature-regulating, odor-resistant—in a super-soft feel that’s never itchy. That allows you to wash less, wear longer, and simplify your closet and your luggage. This bad boy is strong as steel, light as a feather, and ready when you are.

Features

• Made from the world’s best merino wool, and reinforced with Spectra®, a fiber 15x stronger than steel—no more tears and holes in your workout shirts
• Naturally moisture-wicking and temperature-regulating
• Odor-resistant for 72+ hours of non-stop wear, allowing you to simplify your closet and your luggage
• Super-soft feel that’s never itchy
• Rated UPF 30+ for sun protection
• If you’re after something softer and more suited for everyday wear and travel, reach for our signature 72-Hour Merino Tee.

Sizing

• The 72-Hour Merino Tactical T-Shirt has a classic fit. Take your normal size.
• For the best personal fit, 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	26¾	27½	28¼	29	29¾	30½	31¼
Sleeve Length	16	16¾	17½	18	18½	19	19¾

All measurements are in inches.

How to Measure - Chest: Measure straight across from edge to edge, starting 1" below the armhole, multiply by 2 - Shoulder: Measure straight across from shoulder seam to shoulder seam. Again, it’s easiest to measure across the back of the garment - Body Length: Start at the top of the shoulder where it meets the neck seam, and measure straight down to the hem - 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

• 95% Merino wool, 5% Spectra®
• Fabric Weight: 150gsm
• Machine wash cold on delicate cycle, do not bleach, tumble dry low, do not dry clean

About the 72-Hour Collection

The team at PROOF created performance gear that can be worn for 72 hours straight without showing any signs of wear—or, you know, odor. It’s built from the softest and strongest merino wool on the planet. To back up that claim, we’ve packed pieces from the 72-Hour Collection 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 gear isn’t just for adventure, it’s also a bestselling pick for everyday wear.

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