Made of 52% Wheat Straw and 48% Polypropylene plastic; Reusable card case made with interior Aluminum RFID Panel; Made using approx less plastic by blending with wheat straw; Holds approx 2 to 3 cards; RFID protects the integrity of your electronic personal data on credit cards; Product Size: 3.625 w x 2.5 h x 0.25 d