infoUnderstanding the rating system
Our ratings are an independent and objective assessment of helmet performance for consumers, free from manufacturer influence. We rate each football helmet based on the results of 48 impact tests in our laboratory. A pendulum designed to match helmet-to-helmet characteristics in football is used to test the helmets. We measure linear and rotational accelerations for each impact, which are correlated to concussion risk. Each lab impact is weighted based on how often a football player might experience a similar impact. We compute concussion risk from measured peak linear and rotational accelerations for each test. Each risk is multiplied by its weighting factor and then summed together to compute an overall score. The overall score estimates the number of concussions the average person would see if they experienced identical impacts at rates matching their weightings while playing football. A lower score indicates better helmet performance. The score values in these ratings are not comparable to score values in our helmet ratings for other sports. This is because there are differences in test methods, impact conditions, risk calculations, and impact weightings specific to each sport.
We test the helmet's front, front boss, side, and back at low, medium, and high impact energies. The low impact severity represents common impacts in football. The high impact severity represents the types of impacts most commonly resulting in concussions. The medium impact severity falls in between.
