A protective helmet including: a front shell; and a rear shell hingedly movable with respect to the front shell to provide: an open configuration in which the helmet is able to be placed on a user's head or removed from the user's head; and a closed configuration wherein the rear shell is releasably lockingly engaged to the front shell for securely containing the head within the helmet; a multiple point locking system including: an upper dorsal connection for hingedly connecting the rear shell to front shell, thereby to enable movement between the closed configuration and the open configuration. one or more lower side connections for releasably locking the front shell to the rear shell thereby to selectively lock the helmet in the closed configuration; and characterized in that the helmet includes an emergency release mechanism configured to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell, wherein the emergency release mechanism includes a tab member that is physically coupled to the dorsal connection and side connections, wherein the tab member is configured to be manually engaged thereby to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell. a front shell; and a rear shell hingedly movable with respect to the front shell to provide: an open configuration in which the helmet is able to be placed on a user's head or removed from the user's head; and a closed configuration wherein the rear shell is releasably lockingly engaged to the front shell for securely containing the head within the helmet; a multiple point locking system including: an upper dorsal connection for hingedly connecting the rear shell to front shell, thereby to enable movement between the closed configuration and the open configuration. one or more lower side connections for releasably locking the front shell to the rear shell thereby to selectively lock the helmet in the closed configuration; and characterized in that the helmet includes an emergency release mechanism configured to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell, wherein the emergency release mechanism includes a tab member that is physically coupled to the dorsal connection and side connections, wherein the tab member is configured to be manually engaged thereby to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell. an open configuration in which the helmet is able to be placed on a user's head or removed from the user's head; and a closed configuration wherein the rear shell is releasably lockingly engaged to the front shell for securely containing the head within the helmet; a multiple point locking system including: an upper dorsal connection for hingedly connecting the rear shell to front shell, thereby to enable movement between the closed configuration and the open configuration. one or more lower side connections for releasably locking the front shell to the rear shell thereby to selectively lock the helmet in the closed configuration; and characterized in that the helmet includes an emergency release mechanism configured to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell, wherein the emergency release mechanism includes a tab member that is physically coupled to the dorsal connection and side connections, wherein the tab member is configured to be manually engaged thereby to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell. an upper dorsal connection for hingedly connecting the rear shell to front shell, thereby to enable movement between the closed configuration and the open configuration. one or more lower side connections for releasably locking the front shell to the rear shell thereby to selectively lock the helmet in the closed configuration; and characterized in that the helmet includes an emergency release mechanism configured to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell, wherein the emergency release mechanism includes a tab member that is physically coupled to the dorsal connection and side connections, wherein the tab member is configured to be manually engaged thereby to simultaneously release the dorsal connection and unlock the lower side connections such that the rear shell is removable from the front shell.