PERFORMANCE DESIGN The Under Armour(R) Men's Baseball ColdGear(R) Long Sleeve Shirt is the perfect baselayer to keep you warm and dry without the bulk 4-way stretch construction allows for optimal mobility while material wicks sweat and dries fast Anti-odor technology prevents the growth of odor-causing microbes Strategic mesh underarm panels adds breathability 87% Polyester,13% Elastane Style #: 1356872