AP --  Four organizations have been awarded a total of $1.37 million by the NFL to support the creation of their helmet prototypes.

As part of the NFL Helmet Challenge, a contest with an additional prize of $1 million, receiving grants will be Impressio Inc. and CU Denver; Xenith Project Orbit; Kollide; and the University of Virginia.

The Helmet Challenge aims to stimulate the development by experts, innovators and helmet manufacturers of a new helmet that based on laboratory testing outperforms all helmets currently worn by NFL players. The contest is sponsored by the league and Football Research Inc.

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