FEATURES: Durable magnesium frame for lightweight protection Use with 11" and 12" softballs only Do not use with balls under 11" DESIGN: Fits head sizes 6 1/4" - 6 3/4" Secure Design: Adjustable harness keeps guard in place while running and fielding Enhanced Fit: Adjustable chin and forehead padding for a custom and comfortable fit Open Mask: Design allows for increased airflow and visibility