The use of the 3 points safety belt has saved a great number of human lives. Head impacts onto the steering-wheel still cause deaths but, moreover, a lot of face injuries. Airbags are good answers to the problem. When the bag dimension is limited to 30 l, the protection function is achieved and most of the drawbacks are avoided. This makes low cost design possible. Some of the functions need optimization, while the inflator requires a complete change of technology as proposed by Autoliv and Livbag.