AIRBAG SYSTEM FOR A RESTRAINT SYSTEM AND RESTRAINT SYSTEM HAVING A SAFETY BELT DEVICE AND AN AIRBAG SYSTEM

An airbag system for a restraint system having an inflatable airbag, and a gas generator which is fluidically connected to the airbag and which inflates the airbag when activated with a gas, the airbag has a retainer for retaining on a safety belt of the safety belt device, the airbag has a main chamber fluidically connected to the gas generator and which, in a fastening position of the airbag system predetermined by the retainer, rests against the safety belt, and at least one additional chamber is provided on the side of the main chamber facing away from the safety belt and is separated from the main chamber by means of a partition wall, and at least one opening, via which the additional chamber is fluidically connected to the main chamber, is provided in the partition wall.