Minnesota Vikings 1961-1979 Riddell NFL Authentic Pro Line Throwback Full Size Helmet. Enjoy the look of more recent yesteryears with Riddell's throwback VSR-4 style helmets. The same style helmet that has been a mainstay on fields for over twenty years, in the logo designs of the more recent past. The ultimate football helmet collectible. This officially licensed NFL Pro Line helmet is just like what the pros wear. Features: Official team decals. Kra-Lite II¬ Polycarbonate Lexan shell and inflatable liner with 2 inflation points. Steel polyvinyl-coated quarterback / running back style facemask and 2-point chinstrap.