The bell full flex bmx helmet is brand new for 2015 and it39s been engineered to inspire action sports athletes as they push new limits the helmet combines cutting edge technologies with full cut style the new epp liner has been specifically designed for action sports where crashes are bound to happen the liner compresses to absorb the energy of an impact but then it just rebounds making it perfect for skating or bmxers the shell itself has a double wall construction made from an impa