Under Armour Heat Gear Short Sleeve shirt

Compression: Ultra-tight, second-skin fit for a locked-in feel.
HeatGear® fabric, with all the benefits of UA Compression, comfortable enough to be worn all day
Stretch-mesh underarm panels deliver strategic ventilation
UPF 30 protects your skin from the sun's harmful rays
4-way stretch construction moves better in every direction
Material wicks sweat & dries really fast
Anti-odor technology prevents the growth of odor-causing microbes
84% Polyester/16% Elastane

            CHEST (in)    WAIST (in)

XS       30-32               26½-27½

SM      34-36               28½-30

MD     38-40               31½-33½

LG      42-44               35-37