This not only allowed the cards to bend without creasing, but as the cards aged they stayed to true form. You won’t find that with PVC plastic made playing cards. The shape of the cards will eventually shift, which is a huge no-no in the playing card industry. Especially in casinos where they would be considered marked. So when you look into purchasing a Kem playing cards deck, expect to pay more. The cellulose acetate is more expensive, but the quality is unbelievable.