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The S.T. Dupont Défi, meaning 'Challenge' in English, features a frame in precision-injected, palladium-plated metal — a technique used in the aeronautics industry — with an outer shell of precisely-perforated, full-grain calfskin that feels as comfortable as your favorite driving gloves. The Défi's dynamic shape is responsive, elegant, and fiercely contemporary with an ideal weight. The integrated design of the elongated clip lets it slip into your pocket without the slightest resistance. The Défi sets new visual and performance standards, challenging the traditional concepts of pen design.