Named after sailing, but built for running.  Sound weird?  Don’t worry – there’s nothing too complicated about Merrell’s Trimaran shirt; it’s a straightforward “Does what it’s supposed to do” shirt to help you sail smoothly into hot summer running.

Merrell Trimaran Shirt Features

  • Material: 100% polyester
  • Weight: approx. 4oz.
  • Two-sided, double-knit Opti-Wick fabric
  • Reverse contrasting side panels
  • Flatlock stitching
  • Forward shoulder seams
  • 28.5″ center back length (size large)
  • Reflective logo
  • Four color options
  • MSRP $40

Merrell Trimaran Shirt Review

The first thing I typically do when encountering a product name I don’t recognize is to look up the meaning.  So what’s a trimaran, you ask?   Turns out it’s a boat.  A multi-hulled boat thought to originate from native Polynesians, to be exact.  What does that have to do with a running shirt?  Um … I have no idea.

Maybe it implies smoothness – which would work, since Merrell’s Opti-Wick fabric has an inherently soft feel against the skin. The Trimaran uses flatlock seam construction, and places seams in offset low-stress areas (i.e. not directly through the armpit or straight down the side) that virtually eliminates chafing on high-mileage runs.

Maybe the name has an island connotation – which could work as well, since the fabric dries quickly and wicks moisture very effectively to keep you comfortable even in hot and humid conditions.   I’ve also worn this shirt as a base layer under a thin jacket on cool mornings, and been very happy with temperature regulation throughout a multi-hour outing.

Styling of the Trimaran is basic and sharp – especially the cobalt or charcoal colors – making the Trimaran a good-looking shirt for wearing around after your workout if you don’t have time to change.  The polyester will retain some odor once your sweat evaporates, but if you keep a proper distance from folks you’ll get along just fine.

Good Trimaran

  • Comfortable feel against skin
  • Effective moisture wicking
  • No seam irritation

Bad Trimaran

  • Runs somewhat small – consider sizing up one size

Bottom Line: Merrell Trimaran Shirt

Merrell’s Trimaran shirt does everything a running shirt is supposed to do: it manages moisture, keeps you comfortable, and helps you look good along the way.

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About Author

Donald is a physical therapist, ultrarunner, barefoot aficionado, and father of three with more than 20 years of experience in endurance sports. When he's not training for ultramarathons, he enjoys hiking or slacklining with his family in Monterey County, CA.


  1. I am probably going to get this shirt because you said it minimized chaffing. That was such annoying problem for me until I reduced it by shortening my arm swings while running. What are those sandals you are running in in the picture?

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