True to the brand's DNA, Line D products have been designed without compromise and with particular attention to functionality, comfort and ergonomics. Line D takes its inspiration from the identity of old-style trunks. With respect for tradition, S. T. Dupont chose the best hides: Line D, Contraste and Diamant leather (the only leather in the world tanned using diamond powder — only available to order). The palladium fasteners reflect the power of the precious metal, and a tricolour band, sewn by hand, is a reminder of the House's French identity. This wallet conceals RFID protection technology integrated in the lining of the vents to protect personal data contained from any risk of wireless identity theft.