DE 202006010501 U1 UPAB: 20061018 NOVELTY - The helmet (11) is designed as a core element (12) matching the shape of the head of the user and comprising a padded inner lining (14). The inner part (12) is accommodated in an outer helmet (16) with a tail part (18) resting on neck and shoulders (23), and a visor (19) at the front. Both elements (12,16) a pivotally joined at the sides (24) of the helmet (11) facilitating a slight motion of the head without moving the aerodynamic outer shell (16). USE - The inner protection shell movable joined to an aerodynamic outer shell is part of a safety helmet for a cyclist in particular when participating in race. ADVANTAGE - The user can move his/her head without disturbing the aerodynamic arrangement.