Under Armour Cap Mens. Under Armour Cap MensTop off casual outfits with the Cap from Under Armour. Crafted with a curved peak and tonal stitching, this lightweight piece is perfect for everyday wear.> Cap> Curved peak> Lightweight> Elasticated> Tonal stitching> Breathable> Classic fit> Under Armour branding> 60% polyester, 40% elastane