Impact protective headgear

Impact protective headgear comprising:

• (A) a molded skull encasing component composed of an impact energy absorptive cellular polymer material, said skull encasing component having a crown portion to overlie the top of the skull and, integral with and depending therefrom, front, side and back portions, the bottom edges of said depending portions defining a lower margin of said skull encasing component and at least two spaced apart slots extending downwardly from the periphery of said crown portion and coursing through said lower margin;
• and
• (B) an exterior shell composed of a tough, resilient, abrasion resistant non-cellular polymer material to receive and retain said skull encasing component therein, said exterior shell comprising an upper crown element having a crown portion and, depending from said crown portion, a front portion, side portions and a back portion, the lower ends of said depending portions being secured to a lower head encircling element comprising a frontal headband section, depending side sections and, extending rearwardly from said side sections, back tab sections, said back tab sections having opposed spaced apart free ends, the free end edge of each said tab section having an array of lacing holes therethrough and a lace reeved through said arrays of lacing holes, thereby defining adjustable constricting means whereby tightening of said lace acts to urge the spaced apart free ends of said tab sections together and to adjustably reduce the head size of said shell and said skull encasing component retained therein.