The Fibonacci Marthyr White is a long-sleeve dress shirt in a white base with fine vertical pinstripes in blue and gold running the length of the fabric. Bright blue buttons create a confident contrast down the front placket, while a blue floral-paisley contrast fabric lines the inner placket and turns back at the cuffs to reveal a bold design accent. The spread collar sits neatly and frames the neckline.

Built from Italian mill fabric, twenty-six individually cut pieces are assembled with German stitching and hand-finished in Turkey. The construction delivers comfort, drape, and durability in equal measure.

The Fibonacci fit follows Maceoo's MIT-engineered algorithm, designed in Paris to pull the shoulders back and create a natural V-shape silhouette that improves posture and flatters without restriction.

Wash cold and lay flat to dry.