The Under Armour HeatGear® Mock Long Sleeve is designed for ultimate performance and comfort. This baselayer is engineered to wick sweat away from your skin, keeping you dry and comfortable, so you can focus on your activity. The super-light HeatGear® fabric provides superior coverage without adding bulk, while mesh underarm and back panels ensure strategic ventilation. Its ergonomic design, featuring hybrid raglan sleeve construction, enhances range of motion and comfort by keeping seams away from high-abrasion areas and increasing durability. The material is quick-drying and offers 4-way stretch construction for better movement in every direction. With a mock neck for added coverage and anti-odor technology to prevent microbial growth, this long-sleeve shirt is ideal for any athlete. It's made from a blend of 90% Polyester and 10% Elastane. Care instructions include washing the garment inside out with like colors using non-chlorine bleach only when needed, tumble drying on low, and avoiding ironing, softeners, or dry cleaning.