A long-sleeve dress shirt in deep black with a smooth, performance-stretch finish. The spread collar sits clean and structured, and tonal dark engraved-logo buttons run the full placket for a seamless, monochromatic look. A small branded tag sits at the left hip, adding a discreet signature detail.

Crafted from premium Marthyr performance fabric, this shirt delivers exceptional four-way stretch, moisture wicking, and wrinkle-free properties. The silky-smooth black composition maintains its depth of color and tailored shape from morning through late evening.

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 defined V-shape silhouette. This is the foundational black performance shirt, as confident under a suit jacket as it is worn on its own.

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