A vehicle includes a roll cage and a net structure attached to the roll cage. The roll cage at least partially defines a protected area and at least partially defines an access opening communicating with the protected area. The net structure is selectively configurable in a lowered, closed configuration to at least inhibit passage of an operator of the vehicle through the access opening, and is further selectively configurable in a generally rolled-up, open configuration to facilitate passage of an operator of the vehicle through the access opening.