Kem Paisley Narrow Standard Playing Cards100% Plastic KEM Cards are widely regarded as the world's finest Playing Card. KEM Cards are made entirely of cellulose acetate material, the most durable plastic used today in playing card production. KEM is the only playing card that delivers the classic snap and feel of paper, with the unmatched durability and security features of plastic. Scuff and break resistant, Kem Cards are also completely washable.