Inflatable curtain cushion

A novel safety restraint system especially well suited to protect occupants of a vehicle from lateral impact is described. One or more cushion portions are provided and installed to inflate between an occupant and a lateral surface, such as a door or side window. The cushion portions may be connected to an air source or to each other through the use of sail portions and supply tubes, which may be attached to the cushion portions by chemical bonding, adhesive bonding, sewing, RF welding, or any other suitable method. The cushion portions may have an interior coating of a urethane based substance, mated to a similar substance coating the exterior of a supply tube or sail portion. The cushion portions may then be RF welded to the sail portion or supply tube without restricting gas flow into the cushion portions. The sail portions and supply tubes are preferably fabricated from a material different from that used to form the cushion portions, so as to reduce the cost and weight of the safety restraint system.