First Aid kit

Don't know if I've posted this in the right forum, but anyway...
As we all know, it's mandatory to bring your beacon, probe and shovel into the BC, but what do you bring in your first aid kit, and why? Do you, like me, have a "standard" that you bring no matter if you go for two hours or five days? Or do you change and then why?
Thinking about what you choose and why is a great part of my safety work so I'd be more then glad to hear about your takes on this.
//Tompan