Pro-Tec Classic helmet. 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 pioneered over the last 40 years. The Classic certified is equipped with EPS foam and is CPSC/CE certified. Imported. Size Chart: XS: 20.5"-21.3" Head circumferenceS: 21.3"-22.0" M: 22.0- 22.8" L: 22.8"-23.6" XL: 23.6"-24.4"