Factors in the design of protective helmets.
D000054:Acceleration; D000060:Accidents, Aviation; D000388:Air; D000401:Aircraft; D003020:Clothing; D006259:Craniocerebral Trauma / Q000517:prevention & control*; D006801:Humans; D008722:Methods; D011108:Polymers; D012887:Skull Fractures / Q000517:prevention & control*
D011108:Polymers