If you are driving a borrowed vehicle and the vehicle is damaged in an accident, you have to rely on the fact that fully comprehensive insurance has been taken out. With older vehicles in particular, that is often not the case. ELVIA third-party driver insurance pays the costs of the vehicle repairs in such cases.
Even if the vehicle owner does have fully comprehensive insurance, ELVIA third-party driver insurance is still useful to have, as it covers the loss of the no-claims bonus and the deductible resulting from an accident.
ELVIA third-party driver insurance does not only protect you in Switzerland. Your costs are covered even for accidents which occur abroad.