Basically just phone numbers, allergy, and insurance information, that sort of thing. I attached it to the backpack that I would wear while mountain biking. Well, it's been forever and pretty much every single thing on there is outdated, so I need to update it. But I'm also thinking...how would you destroy something like this, if only some of the info became outdated? I don't necessarily want that information, engraved in steel, just floating around in the garbage can.