Features: Bombshell Ear Pads Removable Goggle Lock 14 Vents Bombshell Construction Airflow Climate Control Air Evac Ventilation Convertible Pad Kit Included For Year-Round Use ASTM F 2040, CE EN 1077:2007 CLASS B, CPSC certification From the skate park to the terrain park, the Holt has you covered with smooth style & a year-round, convertible pad kit. SIZING: + Small 52-56 cm + Medium 56-58 cm + Large 58-60 cm + X-Large 60-62 cm.