Trouser features are important elements of a pair of trousers. A PLEAT is a fold in the fabric of the trousers, usually running down the center of the leg. Pockets are openings in the trousers that allow the wearer to store items. A CREASE is a line in the fabric of the trousers, usually running down the center of the leg. Flares are trousers that widen from the knee down, creating a bell-bottom shape. All of these features are important elements of trousers and can be used to create different looks.