This invention is directed to an inflatable fibre reinforced bag having a flat and generally round shape in uninflated condition, comprising at least one interior elastomer layer, a fibre reinforcement structure and an outer elastomer layer, wherein a reinforcement structure consisting of continuously wound reinforcement fibers running from pole to pole substantially closes said poles.

Systems and methods of leveling a vehicle are disclosed. Exemplary implementations may: provide a plurality of air bag jacks under the vehicle; determine roll and pitch information of the vehicle; determine, using a computing system, an amount of air-adjustment to make for one or more of the plurality of air bag jacks, based on the roll and pitch information, to level the vehicle; and activate, via the computing system, an air compressor to make the determined air-adjustment.

Systems and methods of leveling a vehicle are disclosed. Exemplary implementations may: provide a plurality of air bag jacks under the vehicle; determine roll and pitch information of the vehicle; determine, using a computing system, an amount of air-adjustment to make for one or more of the plurality of air bag jacks, based on the roll and pitch information, to level the vehicle; and activate, via the computing system, an air compressor to make the determined air-adjustment.