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Men's UA MK-1 Short Sleeve

Style # 1306428
Height: Size: Fit: Fitted
Size and Fit Guide
Due to limited quantities, only 100 allowed per customer.
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Height: Size: Fit: Fitted
Men's UA MK-1 Short Sleeve

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Product DNA

These are the go-to gym shirts for nearly every guy. The fabric dries fast to keep you cool and the streamlined fit cuts out any bulk or unnecessary material.

It's also part of the UA MK-1 system—gear that all works together to give you what you need in 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
  • Imported

Review Summary

23 Reviews
30% of reviewers recommend


Runs small Runs large


Min. Max.


Min. Max.

Great look Great comfort

I own several of these tees. They have a flattering shape and fit well for me in the XXL size. The body is longer than many other tees so I find excellent for tennis as they don't ride up when serving. Good range of colours and very comfortable for any activity.

One of my favs!

At first glance, this may appear a simple tee, but it is one of the best-fitting pieces of active gear I own. Its next-to-skin fit is ideal, especially for those who train, or those who are after a slimming fit. It works well at keeping me cooler and dryer during a workout, and is comfortable if wearing throughout the day. I can't own enough of these tees!

Love the length and fit! Always wear these shirts when I train.

Love the length and fit! Always wear these shirts when I train.

Love how this shirt fits

Best fitting shirt from UA, even better than Raid. Wish it came in brighter colours, like red or royal blue, but I like this so much I’ve bought one in each colour.


The length of the black shirt i got is too long. it doesn't look that long in the picture but it was almost 1.5" too long on me. Didn't notice much difference in performance from a regular heatgear shirt. Not worth the additional cost over the regular heatgear shirt.


I purchased 3, white, black and a gray. Unfortunately they are not like the Raid they once had as the length is not a below the waist fit. This actually goes to the midsection to lower part of my butt. Not a fan of the length. Yes it is a bit tighter in the chest and shoulders then raid but it's something I could get used to. However due to the length I will have to return. That's something I cant get passed. FYI I am 5'7 155lbs and fit.

Best training t-shirt I ever had

Perfect fit! It stays dry, fresh and light, even after a high intensity training!


This shirt fitted perfectly & is very well made. Typical with all Under Armour apparel, it is a quality product

Very bright!

Other than my daughters comments that they’ll never loose me in this “traffic cone coloured” shirt, it was a great choice!