Wear official ND Under Armour Gear from Fanatics.com. There's plenty of ways to wear your Fighting Irish colors, but putting on Notre Dame Under Armour Apparel is the official way to wear the navy, green and gold. Fanatics has the newest Notre Dame Under Armour Polos along with performance shirts, shorts, jackets and Notre Dame Under Armour Hats. Cheer on the Irish in the same Under Armour gear the coaches wear with the Notre Dame Under Armour Sideline Gear this season, too. Score Fighting Irish Under Armour Clothing for men, women and youth at the ultimate University of Notre Dame Store, Fanatics.com.