Travelingand hair straighteners?

I'm going to Greece soon and I'm bringing my straightener but I've heard that I need to have special adapters, transformers, volt converters, etc , etc. I really don't want my straightener to break, It is a CHI straightener and it has 25 watts, or 220 volts. I'm getting confused looking at all the stuff on the internet because it's all different. I would just like to know straight forward what I need to make sure it doesn't break.