The Under Armour UA Fly By 3'' Shorts are made of lightweight, durable fabric that wicks sweat and dries quickly. Super-breathable mesh panels improve ventilation. They have built-in short sleeves for better coverage and an elastic waistband with an internal drawstring for maximum comfort. On the right side there is an invisible zipper pocket for headphones, keys or a card. The main fabric contains at least 90% recycled polyester. Reflective logo increases visibility.