It's a convenient way to shop abroad which is easier to budget with than a debit or credit card. It’s also safer than carrying bundles of cash and less hassle than travellers cheques.
Simply load up the card with money from your debit or credit card, then spend or withdraw cash from ATMs* as and when you need it. And because it is a prepaid card you won’t spend more than you budgeted.
*ATM withdrawal fee in card currency is $2/€1.50.