seidensticker is a well known German brand Seidensticker primarily uses high-quality cotton fabrics for their shirts, with finishes such as poplin, twill, chambray, Oxford, and others. The fabric in the image appears smooth, finely woven, and lightweight, which is characteristic of poplin or chambray. • Poplin: A very versatile, tightly woven cotton fabric known for its smooth texture and durability. It is commonly used for business shirts. • Chambray: A lightweight cotton fabric with a plain weave and a slightly bi-colored effect, often appearing smooth and soft. According to Seidensticker’s fabric guide, poplin and chambray are both favored for sleek, business-appropriate shirts, and both provide a comfortable, natural feel due to their cotton composition. Most Seidensticker regular shirts are made from 100% cotton, supporting breathability and comfort