Article by Sam Winebaum
Mack Weldon is a New York City brand on a mission to reinvent Men's Basics: underwear, socks, shirts, and now athletic shorts. They do this through smart design, premium fabrics, and simple shopping. We had heard of the brand and seen their ads appear on our pages. We were curious when they reached out to RoadTrailRun to test their Stratus Short, their first athletic short ,and an AirKnitX T shirt. Of course we were a bit skeptical and are always picky when it comes to run shorts as what could essentially is an underwear company do to improve on this run essential?
We knew Mack Weldon focuses heavily on the comfort of their fabrics, sourcing unique materials always of interest here at RoadTrailRun, so we said yes. Our interest really perked up when we learned the fabric of the Stratus short was treated with 37.5 Technology which we have also tested and appreciated for its comfortable temperature and humidity regulating properties in top of the line Salomon S/Lab apparel and race vests. 37.5 is described as follows:
"37.5® Technology helps keep your body at the ideal core temperature of 37.5° Celsius and helps keep the microclimate next to your skin at the ideal relative humidity of 37.5%. When you’re hot, patented active particles embedded in the material remove sweat in the vapor stage before liquid sweat forms, cooling you down. When you’re cold, those same active particles trap your energy to help warm you up."
- 37.5® technology regulates body temperature, eliminates sweat, and fights odor
- Silver XT2® brief liner fights odor (and leaves room for optional underwear)
- 7” inseam
- Zip side pockets and hidden back pocket securely hold phone, wallet, keys
- Laser-cut side perforations for targeted breathability
- Elastic waistband with drawcord for customizable fit
- Reflective side detail for nighttime visibility
- 43% Polyester, 43% 37.5® Polyester, 14% Spandex
The Stratus has a 7" inseam short. Generally, and especially in super humid run weather we steer clear of longer inseams as the legs tend to stick, they get heavy with moisture and in the way. Not so here as the leg openings are sufficiently wide and that 37.5 tech really works compared to any short we have tested. It seemed to draw the moisture and heat out with a distinct feeling of thermoregulation. The outer fabric is very lightly textured, somewhat stretchy but not plasticky feeling, drapes well and never noticeably sticks anywhere. The inner brief is soft and stretchy.