A long-sleeve dress shirt in dark navy with an all-over geometric diamond micro-print in lighter blue and white tones. The repeating diamond shapes create a dense, lattice-like texture across the fabric. The spread collar reveals a white contrast lining at the inner placket, and tonal dark engraved-logo buttons run the full closure.

Crafted from premium Marthyr fabric sourced from Italian mills, this shirt delivers four-way stretch, moisture wicking, and wrinkle-free performance. Twenty-six individually cut pieces are assembled with German stitching and hand-finished in Turkey for precise pattern alignment.

Designed in Paris and shaped by an MIT-engineered fit algorithm developed from data on 30 million men, the Eins Marthyr pulls the shoulders back and tapers through the torso for a natural V-shape silhouette. The dark base with geometric detail works with grey trousers, dark denim, or a charcoal blazer.

Wash cold and lay flat to dry. Available S to 4XL.