Search thousands of fashion stores in one place
How to find the best Black Friday deals

Be inspired

More product details

Accomplish your training goals with the Under Armour® Men's ThreadborneTM Siro T-Shirt. UA ThreadborneTM Siro construction unlocks natural flexibility and enhances recovery times, while the lightweight fabric delivers breathability. Moisture-wicking technology eliminates lingering sweat to keep you dry, and anti-odor properties prevent bacterial growth so your gear stays clean and fresh. Take your performance up a notch with the UA ThreadborneTM Siro T-Shirt. Fitted t-shirt. Breathable material feels incredibly soft and lightweight for unequaled comfort. UA ThreadborneTM Siro fabrication delivers improved mobility and post-workout recovery times. Signature Moisture Transport System wicks sweat away for a dry fit. Antimicrobial technology inhibits the growth of odor-causing bacteria. Flat seams reduce skin irritation caused by chafing. Proposition 65 warning icon. WARNING: California Proposition 65. California Proposition 65. Proposition 65 warning icon. I bought this shirt mostly because it's one of the only workout type shirts that come in a Tall size and it doesn't have those stupid looking too short short sleeves. My only complaint is that it is heavier material that tends to hold sweat in rather than having it evaporate quickly. It almost feels like cotton in that regard. Otherwise I am happy with the purchase. Person that received this gift was so excited! He was showing it to everybody which is a bit out of character, which means he really liked it. Great, true to size and true to colour. Washes good too! I bout a few weeks ago. It fits a little small even though I bought a medium adult men's which usually works. This was perfect. Wore it through the tough mudder and held up. Happy with this purchase. Well made and comfortable. Uncomfortable not so much of the way for air to reach. I bought this shirt a couple weeks ago and I love it. The newer under armour shirts usually do not fit my body type quite right. Normally when I find something that fits my chest and shoulders the mid section is too wide. This seems to be a good fit for a person who is wider at the top and more narrow in the mid section. Colour: orange