Seattle Seahawks Super Bowl 48 XLVIII Champions Riddell NFL Revolution SPEED Full Size Helmet with HYDROFX Decal. One side of helmet has the champions logo and the other side has the Seahawks logo. 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. Riddell's Revolution Speed helmet has taken the football world by storm - and now, the speed helmet is available as a licensed authentic helmet. As a collectible, the NFL Speed will be available in all 32 teams, as well as select colleges coming soon. This Authentic Revolution Speed helmet size is 13.5"(L) x 9.75"(W) x 10.25"(H).