You know our legendary 72-Hour Merino Tee, and now, we give you our 72-Hour Merino Air Tee (originally named the “Mesh Tee” but after thoughtful customer feedback, we agree, “air” sounds way better). It’s a tee born for breathability, and dreamed up by changing the DNA of the OG ever so slightly. It has all the moisture-wicking and anti-odor properties merino wool promises, but its mesh knit gives it an incredible level of stretch. The mesh texture also creates a lighter feel on the body, perfect for hiking, biking, HIIT training, and more. You’ve already got the original 72-Hour Merino Tee. Now it’s time to add this for your most sweat-intensive training. Queue the Metallica playlist.
Features
Performance shirt with a cut that allows space to move
Modified formula has a lighter feel, and high level of stretch
Natural properties of merino wool that wick moisture, resist odors, and regulate temperature
Wool-based products will shrink in the dryer, we recommend a cold/gentle wash cycle and air drying. Or 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
Front 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
99% Merino wool 18.5 micron, 1% Nylon, 150gsm
Made in China with wool sourced from Australia and New Zealand
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 travel, 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.
