Women&#39;s HeatGear&reg; Longsleeve T Tops by Under Armour 5-oz Cationic 82% PolyArmour polyester, 18% elastane UA HeatGear longsleeve tee with compression fit provides superior muscle support Reinvented with longer silhouette for total coverage Rotated side seams for reduced abrasion and a more flattering fit Sweetheart neckline for total comfort