Description of Smith Holt Spacecraft Snowboard Helmet From the skate park to the terrain park, the Holt has you covered with a smooth style and a year-round convertible pad kit. Features: AirEvac design maximizes helmet and goggle airflow to reduce fogging and control temperature Convertible Pad Kit for year round use Bombshell ABS Construction Traditional Sizing: X-Small 52-54cm Small 54-56cm Medium 56-58cm Large 58-60 X-Large 60-62cm