Patent, literature and manufacturer surveys were conducted to collect data indicative of alternate passive restraint systems other than inflatables. The results of the survey provided fifty unique types of devices and concepts which could be classified into seven catagories:​ transparent shields, nets, cushions, arms and barriers, seat belts, integrated seat designs and blankets. These were examined in a preliminary analysis to select the concept/concepts having the greatest potential to equal or exceed the life-saving potential of the inflatable restraint system. The preliminary criteria were loading patterns, practicality and user acceptance. Two systems were selected and detailed analyses conducted using the HSRI three degrees of freedom model. Measured test data for a previously conducted inflatable study were used as input to the program. A 25 G half-sine pulse of 30 mph velocity change created an intolerable response for a 50th percentile dummy contained in a barrier seat concept, but acceptable response for a passive seat belt concept at 30 and 40 mph velocity change. The research concludes that a passive seat belt system is the best device uncovered and that there are recent developments which indicate even greater potential for that type of restraint system.