They provide secure storage for small items and add an extra design element to the sweatshirt. The flaps can be buttoned or unbuttoned for various looks and levels of security.
It's a casual style that's more interesting than a basic crewneck but less formal than a traditional collared shirt. This collar type gives the sweatshirt a relaxed yet stylish appearance.
It's designed for comfort and casual wear, but can easily be dressed up with the right accessories or paired with more formal pieces.
