There was some experimenting done with jump suits that had fabric sewn between the legs and from the arms to the hips. The suits were seriously and literally almost murder to fly, several people came close to or did buy the farm in testing, but it allowed something like a 6 or 8 to one glide ratio so that if you were dropped at 50,000 feet, you could theroretically glide 300,000 to 400,000 feet laterally from the line of flight. This means something like 50 or 60 miles from the drop point. I remember seeing some pictures of failed designs that incorporated a ram front shape that gave the body suit a more wingfoil shape, but that these led to forward speeds that were more than the human body could resist and there were reports of "pilots" suffering broken arms and worse from the turbulance and stress of trying to resist the airpressures. Original names for the suits were "batsuits' after the comic book, but later versions suddenly seemed to disappear leading me to believe that maybe something cool evolved.