Men's UA MK-1 Short Sleeve

Style # 1306428
RP 335,400 RP 559,000
Height: Size: Fit: Fitted
    • Color: White (100)
  • Availability: 
Size and Fit Guide
Due to limited quantities, only 1,000 allowed per customer.
The product can't be added to the bag
Height: Size: Fit: Fitted
Men's UA MK-1 Short Sleeve

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Product DNA

These men's training T-shirts are built with fabric that dries fast to keep you cool, and a streamlined fit to cut bulk. They're part of the UA MK-1 system—a collection of gear keeps you ready for any training situation.
  • Fitted: Next-to-skin without the squeeze
  • Our original HeatGear® fabric is super-light, breathable & dries fast
  • 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
  • Style #: 1306428
  • 90% Polyester/10% Elastane
  • Imported

Review Summary

44 Reviews
32% of reviewers recommend


Runs small Runs large


Min. Max.


Min. Max.

Best fitting shirt

This is by far the best fitting shirts Under Armour has made. Comfortable too. The drop cut in the front and back is perfect! I’m tall and need a shirt that doesn’t look like a belly shirt. Keep making these UA! More colors!

My favorite work out sirts

Nice fit, excellent quality and breathable. I recommended.

Very comfortable and the length is perfect. Doesn't show my skin when I bend forward or squat.

I like the length and quality of the material. Very comfortable to wear.

Perfect for me

I totally love this line. Great for running and for gym

Great workout and everyday shirt

People keep comparing this to the Raid shirt which I think is appropriate. They have several similar characteristics. Overall, the Raid is my favorite but I only have 2 of them as the color choice went away. Both gray and dark gray I have. I have about 10 of these MK1 shirts and they are fantastic. The vented back is nice plus I like the design over the shoulders and down the sides. I've had several small holes appear on the chest of one of them right after a workout, which I've only had for a couple months. Overall, I love this shirt.

Men’s UA MK-1 sort sleeve

The fit is smaller than the ones I normally bought. Overall, it is comfortable, and nice looking.

Cool and nice fit

Very cool. Great for excercise and also fits nicely. This is the second one I purchased.

Comfortable Tee

Definitely love UA line of dri-fit tops as they fits well & especially in humid countries makes more sense to wear dri-fit instead of cotton.

Just perfect

Very nice and comfortable. Marking biceps and chest perfectly. Dries very fast.i strongly recommend this product and its materials.

Exactly what I Need

Fits amazing and I work in the Texas heat and these shirts perform phenomenally. I hope UA never discontinues these shirts!