The ua no breaks collection is designed to keep runners going from early fall to the dead of winter youll get the warmth you need without sacrificing breathability or adding weight the fundamentals fitted next to skin without the squeeze amazingly soft smooth fabric offers total comfortshoulder fabric uses ua microthread technology so it wont cling to you wont chafe it stretches without absorbing sweat4 way stretch fabrication allows greater mobility in any directionmoisture trans