Men's UA MK-1 Long Sleeve

Style # 1306431
Height: Size: Fit: Fitted
Mens UA MK-1 Long Sleeve
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Size and Fit Guide
Due to limited quantities, only 100 allowed per customer.
The product can't be added to the bag
Height: Size: Fit: Fitted
Men's UA MK-1 Long 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
  • Imported

Review Summary

30 Reviews


Runs small Runs large


Min. Max.


Min. Max.

This product has great features

Very nice, comfortable, easy to move in. People loved it on me.

What I was looking for

Comfortable, good fix, good quality, just what I was looking for

Long sleeve tee

This top is Lightweight and holds it's shape, good buy for sun protection

Long sleeved T

Very comfortable long sleeved T perfect for running in cooler weather

Tightness around the forearms

The material is amazing; super comfortable and breathable. The only problem I had was it’s tight around the elbow and forearm region and feels uncomfortable because it then loosens out in the lower forearm and wrist area.

Very nice

Fits great and you don't feels sweaty at a reasonable price!


I now own two colours... Great comfortable long sleeve shirt.. Will probably buy a 3rd depending on colour.

Perfect for laying in cooler weather.

Brought this for my husband to wear under his half zip tops for some added warmth when walking. Great fit and length.

Like wearing a pillow when you workout

Bought it on sale and couldn’t be happier, I wear it when I run, workout and just in general. So to quote the amazing Shia LaBeouf “just do it” (not like the Nike one cause under armour is way better)

Under armour longer shirt

This shirt feels great. It looks good & it's great for cooler weather, but dont need a jumper