4.6 oz Polyester / Elastane
Here's what other sites are saying:
Cool, stretchy & moisture-wicking...it's the essential Under Armour t-shirt. From the gym, to practice, to the field, the Under Armour Men's Tech Long Sleeve T-Shirt delivers superior moisture transport and a full, flexible range of motion. It feels soft like cotton, but performs like only a synthetic can when you're sweating; versatile and ridiculously comfortable, it's your gym-bag essential. Fabric: 95% 4.6 oz. polyester/5% elastane.Spun poly with soft cotton hand; lightweight, durable high-gauge knit fabric provides maximum comfort against the skin. Superior HeatGear moisture transport system wicks perspiration from skin to outer layer allowing the body to regulate temperature in any condition to keep you cool and dry. Power stretch and recovery deliver great freedom of movement.Raglan sleeve construction allows for total mobility and a full range of motion, while eliminating shoulder seam abrasion points. ArmourBlock antimicrobial treatment prevents the growth of odor-causing microbes. Loose fit; generous cut provides full range of motion and a full, comfortable fit.Import.