You spend most of your week in a dress shirt–catching the early morning train, darting around town for meetings, grabbing a late dinner, and all the crazy moments in between. You work hard, but nothing hinders a hustle like sweating through your shirt. That’s why mens essentials brand Mack Weldon has launched The 37.5 Oxford Shirt: a high-performance, low maintenance oxford. This shirt is powered by (and named after) sweat-preventing 37.5 Technology, which is proven to keep you drier and cooler when the going gets tough.

37.5 Technology was created by Dr. Gregory Haggquist, a Ph.D. photo-physical chemist and inventor. In 1992, while Dr. Haggquist was in Japan on a JSPS postdoctoral fellowship, he was taken to the volcanic sand baths on Mt. Aso. At first, he thought he would only be able to stand the heat for a few minutes, but once buried in the sand he found it not to be hot but comfortable. So comfortable he stayed in the sand for an hour. What he realized is comfort comes from balance, a balance between heat gain and heat loss. The volcanic sand was removing the sweat vapor from his skin so fast that he was continually cooled by sweat evaporation. This was the moment of clarity, when Dr. Haggquist understood that removing the sweat vapor before it turns to liquid sweat was key to comfort. While others were focused on wicking—spreading liquid sweat on fabric—Haggquist focused on reducing humidity next to skin to maximize evaporate cooling. And it turned out by enhancing comfort human performance was increased by reducing core temperature buildup.

Now, 27 years after Dr. Haggquist’s aha moment, you too can experience the volcanic sand bath phenomena when wearing Mack Weldon’s 37.5 Oxford shirt. You may only figuratively be scaling mountains, but rest assured that the 37.5 Oxford will keep you looking and feeling fresh while you do.

PRODUCT FABRICATION & BENEFITS:
Sweat-preventing 37.5 cools by removing sweat vapor before liquid can form
Underarm sweat guards for targeted (yet discreet) protection
Easy care so you can skip the iron and dry cleaners
Classic fit dresses up or down
Versatile length for optimal tucking
Button-dock collar for a smart-casual look
Double-button cuffs for easy rolling
FABRIC: 60% Cotton/40% 37.5 PolyesterCOLORS: Bright White, Indigo, Blue Yonder
PRICE: $88 at mackweldon.com / in-store at Hudson Yards NYC

Since launching in 2012  Mack Weldon has become an expert on essentials such as underwear, socks, tees, swim, activewear, and accessories. One might say that in debuting a dress shirt the brand is taking a step outside of their comfort zone. That may be true, but it’s with the ultimate goal of keeping their customers sailing comfortably–and sweat free-within the limits of theirs.