Dalvin Cook autographed memorabilia has been one of the hottest sellers in the NFL. This Dalvin Cook Autographed Minnesota Vikings Riddell Replica Full Size Helmet - JSA Authentication has been hand signed by Vikings Rookie, Dalvin Cook and witnessed by James Spence Authentication (JSA). Full size replica helmets are the closest model to the style the Pros wear. Dalvin wears this "Speed" style on Sundays. Dalvin Cook is poised for a breakout season with the talented Vikings. Your package will included a Certificate of Authenticity from JSA and matching tamper-evident sticker on the product. Dalvin Cook took the NFL by storm in 2017 and projects to have a great career with the Vikings. Shop with confidence as this Dalvin Cook signature is 100% authentic. Sports Collectibles backs this product with our 100% Money Back Guarantee.