Save does not charge an international card use fee. When using your card, any applicable conversion rates will be applied directly by the card network (Mastercard, Visa, Amex) of the merchant you made a purchase from.
If using your card for an ATM withdrawal, you may see an additional ATM withdrawal fee assessed by the ATM. Save is not able to change any conversion rates or ATM fees applied.
Be sure to set up a travel alert when traveling internationally, to avoid any card interruptions.