Featuring tsg39s custom low and snug fit the evolution graphics helmet is the least voluminous hardshell design available and fits to your head like a protective second skin it39s a tough hardshell construction that curves anatomically correct around your head for a great fit and wearing comfort the evolution is shaped on all four sides of the helmet and fits without slipping or jiggling it is the shape and fit role model for most of tsg39s helmets but it39s not just all about th