Lighter performance materials give you the same compression support you look to UA for, with increased breathability at the sides and back. Made of polyester and elastane. Signature moisture-wicking response pulls sweat out of knit so that it rapidly evaporates away for a drier feel. Antimicrobial tech helps knit resist growth of odor-causing microbes. 4-way stretch allows compression fit to stay engaged and gives you the ability to move freely. Crewneck is smooth and narrow, with band set into body. Hybrid long sleeves have raglan seams for a fuller range of motion. Seams are moved forward off the shoulder to prevent chafing. Ergonomic insets at sides and lower back improve fit and have an athletic mesh knit so that air can freely circulate. Fabric info tags on inner left side seam. Under Armour logo on chest, at left. Locker oval at top of back.