From the manufacturer:
New Zen decks from Expert Playing Card Co.!
We released an early version of these as a prototype while experimenting with the best inks for playing cards. After much effort, we have perfected these and are delighted to offer them to you!
They feature a truly stunning sideways tuck case with fiery red foil and lavish embossing, both of which are complemented by the exquisite matte black paper stock.
The decks are a classic white bordered deck in a black back design featuring the Expert Playing Card Co.'s signature Zen logo with ornate scroll work comprising the rest of the card. The fantastic back design is a reproduction of a very old and extremely rare deck of cards.

video review: https://www.youtube.com/watch?v=1x6YtqSR-tU

Expert Cards: http://expertplayingcard.com/

Buy yours: http://legendsplayingcards.com/products/zen