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Blue & Yellow Skull Cap – Coach's Team Sports
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Report warned Riddell that no helmet could prevent concussions but NFL's helmet-maker marketed one as such anyway - ESPN
Jordan Skull Cap
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Barnaby Grimes: Return of the Emerald Skull – Author Paul Stewart; Author Chris Riddell – Random House Children's Books
More padding the issue of concussions and better helmets
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Blue Skull Cap – Coach's Team Sports
Riddell Unveils Overhauled New Football Helmet SpeedFlex - ABC News
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Schutt Skull Cap :: Bayer Team Sports
PHILADELPHIA PHILLIES RIDDELL MINI HELMET - Bucks County Baseball Co.
