STX Lacrosse Stallion 500 Helmet The stallion 500 helmet features revolutionary d3o material that remains soft and flexible in its natural state but locks together upon impact for superior impact dispersion The stallion 500 includes an ABS shell with impact modifiers for added strength The stallion 500 helmet includes surfeit Air liner that includes an Air pump for Adjustability which allows the helmet to form better to your head The stallion 500 helmet employs adjustable EVA jaw pads with TPU cushioning for impact Absorption