Men's UA MK-1 Short Sleeve

Style # 1323415
Height: Size: Fit: Fitted
Mens UA MK-1 Short Sleeve
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Size and Fit Guide
Due to limited quantities, only 1,000 allowed per customer.
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Height: Size: Fit: Fitted
Men's UA MK-1 Short Sleeve

Product DNA

Go-to gym shirts built with fabric that dries fast to keep you cool, while the streamlined fit cuts out bulk. It's also part of the UA MK-1 system—gear that all works together to keeps you ready for any training situation.
  • Fitted: Next-to-skin without the squeeze
  • HeatGear® fabric is ultra-soft & smooth for extreme comfort with very little weight
  • Mesh back & underarm panels deliver strategic ventilation
  • 4-way stretch construction moves better in every direction
  • Material wicks sweat & dries really fast
  • Anti-odor technology prevents the growth of odor-causing microbes
  • 90% Polyester/10% Elastane
  • Style #: 1323415
  • Imported

Review Summary

10 Reviews

Perfect Performance Tee

I love this tee! The cut is excellent - breathable, yet fitted. It's so great for beach weather where I live. The material lets you breathe and feel dry without the hot, heavy, weighty feel of typical cotton. My work allows black tees and this one is perfect for moving around in. Thanks Under Armour!

Fits perfectly

Fits perfectly, very light and good to workout!!!!


Super comfortable, but runs a little looser. If you want a tighter shirt get a size smaller [This review was collected as part of a promotion.]


The MK-1 line is hands down my favorite so far released from Under Armour. They’re very comfortable and cut perfect for anyone that lifts. My go to shirts now for in and out of the gym. [This review was collected as part of a promotion.]

Best workout shirt I have ever worn

I am 17 roughly around 6’1” I now have two of these one in grey one in blue and a long sleeve one. The MK-1 shorts werent my favourite I still like the supervent and raid series but with that said the MK-1 shirts are worth it. They feel great and they work as amazing as a compression shirt but without the squeeze and more breathable. I sweat a lot so when I am working out its nice that with the back meshing letting air in keeping me cool, I dont get the shirt so wet. [This review was collected as part of a promotion.]

Great product to train

These new MK1 shirts are literally the best shirts to train in. Comfortable fit with optimal performance features like the vented back make this shirt a must for your training collection. I only buy the MK1 shirts now as nothing seems compare. [This review was collected as part of a promotion.]

Comfort and quality

Great quality and perfect fit. Very comfortable clothing. [This review was collected as part of a promotion.]


Fits great! Functions good in the gym! Breathable which is nice. [This review was collected as part of a promotion.]

Comfortable , good fit ,

Material good for daily wear , good for warm weather and workout wear . Laindera well , and maintains fit . [This review was collected as part of a promotion.]

regret buying it

I usually buy the tactical shirts and it fits a little loose, this shirt runs tight,,,, wasted my money