Study: Football Helmet Covers, like Guardian Caps, Do Not Reduce Concussions for High School Players

A study of 2,610 Wisconsin high school football players found that wearing soft-shell helmet covers, marketed as Guardian Cap helmet devices, during practice had no effect on the rates of sports-related concussions. Results cannot be generalized to college and pro players due to differences in helmet covers, according to researchers at the University of Wisconsin School of Medicine and Public Health. This is one of very few studies to evaluate how the caps perform in real-world conditions.