The Under Armour HeatGear Sonic Compression Men's T-Shirt provides the same compression fit and sizing as the original HeatGear compression but with slight differences such as raglan sleeves and center logo placement. The compression fit supports muscles and improves recovery time. HeatGear combined with Moisture Transport technology transfers moisture and heat to the garment's exterior layer for quick release. Smooth polyester fabric with 4 way stretch and anti-odor technology to prevent the growth of odor causing microbes. Great baselayer and workout tee.