There is only one Stabilo Boss Original, its unique and distictive shape is recognised all over the world and has been since 1971 and is Europe's number one highlighter. The Stabilo Boss Original has super fluorescence ink, is an eye-catcher and fits perfectly in every pencil case. Its long life makes it the number one choice and stands for German quality you can trust. Don't worry if you forget to replace the cap, you are able to leave it off for up to 4 hours and the highlighter will regenerate once the cap is replaced.