Can new technology help cut down on concussions? (video)
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NWT Guardian Cap Soft-Shell Protective Helmet Cover Navy
NFL players wear Guardian Caps to reduce head trauma during training camp
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NWT Guardian Cap Soft-Shell Protective Helmet Cover Navy
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
Tennessee football: UT Vols use Guardian helmet covers
Reduces impact up to 33% One size fits all Insulates in hot & cold weather Fits both football and lacrosse helmets Connects to the facemask with 4
Guardian Protective Helmet Cover
Josh Pate Discusses the Guardian Cap on Late Kick Live
Guardian Caps Guardian Sports
Football Guardian Caps XT (Current Model)