Featuring our custom low and snug fit the evolution fits to your head like a protective second skinanatomically correct it smoothly curves around your head for a great fit and wearing comfortthe evolution is shaped on all four sides of the helmet and fits without slipping or jigglingit is the shape and fit role model of all our helmetsbut it39s not just all about the great shape as safety is still of paramount importance to tsgthat39s why all of their products are tested to the highes