At the time, the lone model of the Guardian Cap was the Guardian XT, a 7-ounce soft shell then already popular with a growing handful of elite college programs and hundreds of high school teams nationwide. But the results didn’t measure up under lab conditions simulating the higher speeds and masses of professional football hits. “We didn’t really find that it had much of an effect on the NFL impact environment,” says Ann Bailey Good, a senior engineer at Biocore.
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