Kem playing cards are high-quality playing cards made from 100% cellulose acetate plastic, which makes them extremely durable, flexible, and resistant to marking, denting, or crimping. They are known for their superior snap and shape retention compared to cheaper PVC plastic cards and can last up to 50 times longer. Kem cards are popular among professional players, especially in poker and bridge, due to their premium feel and durability. They come in bridge and poker sizes and have maintained consistent artwork designs since their inception in 1929.