Experts from the lacrosse community, medical field, biomechanics industry, and product testing laboratories collaborated on standard F3137, Specification for Headgear Used in Women’s Lacrosse. Standard was developed to allow for optional use and to ensure that players opting not to wear headgear would not be injured by players who choose to wear protective headgear. Optional status may be re-evaluated once women’s lacrosse community begins to see F3137-compliant headgear in action.