The Evo 4X is the newest Evolution series from Warrior. Introduced for the 2014-15 season, the Evo 4X has a new technology called SymRail, reduces weight on the sidewalls without sacrificing stiffness. This is a slightly lighter head compared to the Evo 3X, but just as stiff. We recommend this head for the all around offensive player. The multiple string holes allows many styles of pockets to be strung. The Evolution 4X is surprisingly wide for an offensive head; a lot wider than other Evolution (X) generation. It is legal for NCAA and all levels of play. The Evolution line continues and is getting better with each generation.