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It might be summer, but five am is never warm. The Arc'teryx Men's Accelerator Zip-Neck Short-Sleeve Shirt uses a midweight fabric that holds off the chill when you're getting warmed up and manages moisture to keep you comfortable after your heart starts pounding and the sweat starts pouring. This balanced shirt will also prevent you from feeling cold or clammy during your cool-down lap on the way home.

  • Midweight Shaide fabric manages moisture to help you regulate your temperature, and it's flexible to promote unrestricted movement
  • UPF 45 shields you from the sun
  • No-lift underarm gussets give your arms room to move without shifting your entire shirt around every time you move
  • Flatlock seams cut down on friction to reduce chafing
  • Reflective accents make you easier to spot when you're out working in low light

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Arc'teryx Accelerator Zip-Neck Shirt - Short-Sleeve - Men's

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Here's what others have to say...

5 5

My Go-To Shirt

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Height: 6' 0"
    Weight: 155 lbs
    Size Purchased: Medium

Keeps me warm at the start of the run, but the zipper allows me to open up and cool off when needed. My other running shirts are getting jealous of how much I wear this one. The turmeric is a great color for trail running!

4 5

Athletic fit

  • Familiarity: I've used it several times
  • Fit: True to size
  • Height: 6' 2"
    Weight: 185 lbs
    Size Purchased: L

i like the fit, also the neck close tight but not to tight , i am 6-2 -195 lbs, mostly muscular :). and its really looks good, got the purple, it perfect for in weather like 60-75 F, seems to be doing a pretty good job of wicking and keeping the smell down :)

5 5

Awesome shirt!

I wear these to play disc golf and have zero complaints. Other than being the most comfortable performance shirt I own it also looks the best. The neck collar is nice, as most performance shirts leave your neck exposed to the sun. I'll have to get one in long sleeve now!