Athletes asked for the original, and Under Armour delivers with the Under Armour HeatGear OG Compression Long-Sleeve Shirt. Using the first version of HeatGear fabric, this Under Armour shirt is thicker and more compressing, with the ultra-cooling performance you love. Built-in 4-way stretch moves with you for unrestricted mobility, and the moisture-wicking, fast-drying performance keeps you cool and dry. Ergonomic flatlock seams ensure a chafe-free fit. The OG is back in the Under Armour HeatGear OG Compression Long-Sleeve Shirt for women. Made from 83% polyester/17% elastane. Compression fit. Machine wash. Imported.Manufacturer style #: 1387697. 83% polyester/17% elastane construction The original HeatGear fabric thicker and more compressing Delivers superior cooling performance Integrated 4-way stretch allows free range of motion Moisture-wicking, fast-drying performance Chafe-free flatlock seams