Under Armour Boys' Size Chart Perform superhuman feats of strength and endurance in the gym with this heroic Under Armour® shirt. Fitted fit is snug, but not tight, for next-to-the-skin support without the squeeze of compression. Four-way stretch allows a wider range of movement and accelerates dry time. HeatGear® technology pulls perspiration away from the skin and pushes it towards the surface for rapid evaporation. Anti-odor technology repels odor and inhibits bacterial growth for prolonged freshness. Classic crew neck. Short-sleeve coverage. Iconic symbol accents the chest. Straight hemline. Flatlock seams reduce chafing and increase comfort. 84% polyester, 16% elastane. Machine wash cold, tumble dry low. Imported. Measurements: Length: 20 in Product measurements were taken using size SM (8 Big Kids). Please note that measurements may vary by size.