Pro-Tec Classic Pendleton Collab Helmet Features: Shell: Durable and tough, Injection moulded ABS (acrylonitrile butadiene styrene) Liner: High impact absorbing EPS foam (expanded polystyrene) Interior: Die-Cut PU Foam Padding with Laminated Nylex Ventilation: 11 Open Airflow Vents Nylon Webbing Chinstrap With Buckle Certification: EN1078, ASTM 1492, CPSC 1203, AS/NZS 2063:2008 Pro-Tec x Pendleton Collab Sizing: XS: 52-54cm S: 54-56cm M: 56-58cm L: 58-60cm XL: 60-62cm From bowls to half pipes, from skate parks to backyards, Pro-Tec has spent the last 4 decades listening to the needs of skaters all over the world, in order to create the best protection available, period. The Pro-Tec Classic certified draws its line of design right back to our original helmet model, but with all the latest technology we’ve pioneered over the last 40 years. The Classic certified is equipped with EPS foam and is CPSC/CE certified. The protective industry jargon in that last sentence means a massive machine smashed this helmet against an anvil in a scientific setting to prove to the world it will keep your precious dome safe when you slam. Pro-Tec does the science so you don’t have to.