TSG - Evolution HelmetHIGHLIGHTS MAXIMUM PROTECTION:?? The outer shell is made of ABS, which has a high impact resistance, is very robust, & works well in cold weather. The inner shell is made of shock absorbing EPS, which is highly effective at reducing the amount of energy transferred to the head during an impact. This helmet is triple certified with the ASTM F1492 American skateboarding & trick roller skating standard, CPSC American bike helmet standard, & EN 1078