Boys' UA Performance Polo

Style # 1290341
Height: Size: Fit: Loose
Boys UA Performance Polo
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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: Loose
Boys' UA Performance Polo

Product DNA

  • Loose: Fuller cut for complete comfort
  • UPF 30+ protects your skin from the sun's harmful rays
  • 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
  • 95% Polyester/5% ElastaneImported


This is what makes our gear work harder—and smarter—than anything else out there.


The original innovation our founder dreamed up. This super-breathable fabric wicks sweat and regulates body temperature so you feel cooler, drier, and lighter than ever.

Review Summary

23 Reviews

Sizing seems to have gotten smaller

The sizing must have changed...the YXS which says it’s supposed to be 6-6X is only slightly bigger than my sons size 4 one (same style). I’d say this YXS is more like a size 5. We have an older Under Armour T-shirt in a YXS that fits more accurately (like a 6-7). Not sure why they would start making them smaller when you can get preschool sizes from 4-7, why would you make the YXS fit like a 5-6??? Aside from the sizing it’s a nice shirt though! Just wish they would make the sizes longer like they used to be.

As expected

Have many of these polos and they are the perfect weight and have a great feel. With the new sizing, YXL is great for my son...but, concerned over the jump to AS. Big length difference; but for now, we are still good with YXL.

Great Product

bought for my nephew - stylish and fits very well. [This review was collected as part of a promotion.]

The best shirt for pre-teen boys!

Boys don't like to wear collared shirts, except for these! They repel stains and wash well. These are the only "dress" shirts that my boys will wear. [This review was collected as part of a promotion.]

Great product

Made small but perfect for my hard to dress up boys who love their athletic wear. [This review was collected as part of a promotion.]

Nice polo, but quality was subpar

The fit and comfort of this shirt is great. It looks nice on, but this shirt has only been worn a handful of times since it was purchased and the logo has completely peeled off. I make sure to follow wash instructions for this also. For the price of the item, I'd expect much better quality

golf shirt

Shipping was fast. The golf shirt that I purchased for my son fits great and washes nicely. I would like more uniform clothing in the outlet store. [This review was collected as part of a promotion.]

Great looking shirt

My son loves under armour. It is such good quality and it feels great wearing it. [This review was collected as part of a promotion.]

Light feeling poli

This shirt is light feeling, good quality. It is a bit larger than the size indicates but my son has grown into it. [This review was collected as part of a promotion.]

My son loves Under Armour - the feel and the fit

For the price, this shirt is a good deal. The Under Armour polo shirts keep their look and color longer than other dry fit brand polo shirts for boys. My son only wants to wear Under Armour for golf. He learns from a top PGA Tour professional who has played with and taught some of the best in the world. [This review was collected as part of a promotion.]