This Men Shirt is crafted in Breton workshops from a unique fabric known as "Rachel knit," which is renowned for its durability and flexibility. This material is designed to replicate the characteristics of the regulation sailor's jacket used by the French Navy.

The Rachel stitch, or "maille jetée," is a specialized technique that combines elements of knitting and weaving, resulting in an "indémaillable" stitch that is exceptionally robust. The tradition of using this fabric dates back to a decree in 1858, which codified the knitting standards for the national navy.