Images Threadborne Siro Crew Neck T-Shirt
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Under Armour® Threadborne Siro Crew Neck T-Shirt

  • color:White/Overcast Gray
  • size: Size Chart
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    • S
    • M
    • L
    • XL
    • 2XL
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Additional Information
All Threadborne technologies have one goal: push the limits of design and manufacturing to reach new levels of comfort and performance. Threadborne Siro fabric gives greater stretch and recovery, ultra-soft feel and more breathable performance. It improves on the previous Tech Tee by giving a lighter weight without sacrificing technology. The seamless construction feels smooth against skin, while body mapped breathability keeps you cool and comfortable. An optimized fit helps to remove distractions during performance. Plus, this tee gives a "cotton feel" while keeping all the same properties of polyester.
  • Pullover
  • Crew neck
  • Short sleeves
  • Loose: Fuller cut for complete comfort
  • Anti-odor technology prevents the growth of odor-causing microbes
  • Machine washable
  • 100%Polyester
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Threadborne Siro Crew Neck T-Shirt is rated 4.2 out of 5 by 73.
Rated 3 out of 5 by from Good but not great... This is definitely the softest t-shirt I've worn. However, why did you have to go and change the stitching??? I've been wearing UA for a long time and I have to say, while the shirt material is the best to come out of the UA line, the stitching is just terrible. It's itchy and it makes the shirt uncomfortable in certain areas during movement. It pulls against the body in a way... I'm not a fan of the way the stitching at the top of the shoulder follows the collar bone either. From the profile it looks sloppy and not as clean as it used to look with the UA tech tees. I bought a bunch of these assuming they would be awesome but have to say I'm a little disappointed and I'm considering exchanging for UA Tech tees.
Date published: 2017-01-13
Rated 1 out of 5 by from Shockingly disappointed I guess it finally happened to me. Got all excited for a new product, bought a few, and now returning all of them. A threadborne crew, v-neck, and long sleeve. The crew- stitching is oddly placed and itchy. Kept having to adjust the shirt. V-neck- the neck line is weird, the black color is tough to look at in person, and the fabric comes with pilling/threads coming out. Same with the long sleeve. Noticed the pilling in the fabric at Dick's this past weekend too, so it's going to be a common problem. Can't even imagine what will happen to these clothes after washing them. And this is coming from someone who has bought a TON of UA products. From shoes to shirts to pants to hats. Threadborne is ThreadDead. Sorry UA. I still love u!
Date published: 2016-12-12
Rated 2 out of 5 by from Threadborne Fabric using UA Tech Design Please This new fabric that UA has engineered is A++. It is super soft and plush like cotton, but performs, stretches, wicks, and dries like a synthetic blend. Ina ll honesty I've been waiting for a shirt like this for a long time. Imagine an American Apparel spun cotton shirt that you can work out in and not be soaked and stink after...amazing right? That part is great. The 2 stars come from the awful design template that was used for these shirts. Some reviews already explain so I will add on. The shoulder stitching makes no sense. What made UA Tech shirts so awesome was the shoulder stitching that went across the chest and back with no seams on the top of the shoulder. That design makes the shirt lay flat creating a neat and athletic fit and profile. The shoulder stitching patter on this new design crosses the top of the shoulder and comes too close to the arm in the under arm area. This probably wouldn't be the worst design ever dreamed up, except that the UA Tech design was so good. Why in the world UA would you change this? This seam pattern does the exact opposite of the Tech and instead creates a very baggy and sloppy looking profile, especially when your arms are in a raised position, and are noticeably felt when the shirt is worn. I wouldn't go as far as some reviews here to say that it's itchy, but you can definitely feel the seams where the UA Tech seams were virtually unnoticeable. Again, if UA took this amazing new fabric and used the Tech templates this would be the best shirt ever designed in short sleeve/long sleeve/qtr-zip, and I would have kept the 18 shirts I bought instead of returning all of them. I'll patiently wait for UA to use this review for the genius that it contains...and create the perfect shirt for all of us.....
Date published: 2017-01-24
Rated 2 out of 5 by from love the material, hate the stitching Purchased an XL Siro in black. Tried it on as soon as I got it. First I noticed right away it was a bit tight for XL (I only wear XL in UA). Secondly the material of the shirt is very nice and of nice quality. However the stitching around the shoulder and arms was not comfortable at all and almost itched. I wore it for a bit longer just to get a feel for it but couldn't get that itch feeling from going away. Such a shame as I was really looking forward to wearing this weekend. I will be sending it back unfortunately. I'm still a big UA fan!
Date published: 2017-06-10
Rated 3 out of 5 by from Good shirt Nice shirt, but very thin and not as nice as previous shirts I've purchased. What's with the huge itchy tag on the side?
Date published: 2017-04-05
Rated 5 out of 5 by from Love it! Please make more clothes in size Medium-Tall Love how soft this shirt is. I bought 5 to wear as undershirts at work. I don't usually write reviews, but I chose to write a review for this shirt so I could ask under armour to please make more shirts in size medium-tall!
Date published: 2017-04-04
Rated 5 out of 5 by from SO COMFORTABLE This tee both looks and feels amazing - soft to the touch, great for working out. I've been a huge fan of the UA Tech Tee but looks like I'll be switching over to this new product. Good work.
Date published: 2016-12-29
Rated 2 out of 5 by from Issues - Threadborne I have purchased many UA products and been very pleased with them all EXCEPT the Threadborne t-shirts. While the material is very soft, this particular t-shirt does not breathe as well as the original line of UA Tech t-shirts. Also, after 1 month of wear tiny fuzz balls are appearing around the neck. I have over a dozen of the UA Tech t-shirts, many over a year old, and they continue to hold up and perform very well. I recommend sticking with what works! The UA Tech.
Date published: 2017-07-14
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