How long do hair extensions last?

Hair extentions last depending on different aspects.If use them everyday then they wont last as long.They can be i.e curled and straightened. I don't know about dying them because they come in all different hair tones.Yes they can be washed with normal shampoo and you can blowdry them but not to close to the clips because this is were they are bonded and they wont with stand heat