Seattle Seahawks Riddell NFL Authentic Pro Line Full Size Helmet with HYDROFX Decal. This helmet has the sticker on the helmet across the top in the design of the hydrofx that is painted on the actual on-field helmet. 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 & 4-point chinstrap.