•HEATGEAR® fabric has the advantages of UA's strong stretchable fabric, making it comfortable to wear all day long. •Elastic fabric stretches easily to help you move freely. •Moisture wicking system technology helps wick away sweat, keeping you dry and comfortable. •Anti-odor technology helps reduce the growth of odor-causing microorganisms. • Stretch mesh panels help keep key areas of the underarms breathable and ventilated. •Mesh panel at the back of the neck is marked with ARMOUR. •According to the L size, the detected weight is about 130G, and there will be corresponding differences in different sizes.