Credit card appearing in fold appeared

One type of three credit card brands, from American Express, a card of the type "Butterfly" appears to come out. A special case is attached, the card can be folded into two and stored.

Details are as follows.
Butterfly from American Express (SM)

Only the gold card holder among individual members can apply for this. It is pretty stylish, and it is assumed to carry around when you are wearing a dress.

It is meant to bring it to parties etc. that are often done overseas, this is.