There are different mesh types made from materials which affect the shot accuracy and handling of the ball. The sidewall is the siding of the head that affects the depth of the pocket and stiffness the feel when handling the ball. More stiff sidewalls and heads are better to use for defense players who want to check harder. More flexible sidewalls are better use of picking up groundballs, movement and face-offs. The pocket is made from mesh, and with these different meshes they can have different capabilities; a wide pocket allows and easier time catching balls, but will also cause less ball control, while a smaller head will allow the user a more hard time catching the ball but lends greater accuracy. The pocket of the lacrosse stick can often be easily adjusted to ensure the depth of the pocket is legal and meets the players preference before the start of a game.