Aizu-momen is a traditional plain-weave cotton textile from Fukushima Prefecture, valued for its durability and once widely used for work clothes. The Aizu region has long been known for cotton cultivation, and during 1573–1592, under the economic policies of Lord Ujisato Gamo, cotton farming was actively promoted. Aizu-momen is characterized by its thickness and soft, full texture, and it is less prone to shrinkage compared to ordinary plain-woven cotton. Its weaving process is distinctive: the warp threads are stiffened by dipping them into a starch solution made from wheat, after which the weft threads are woven in. This treatment creates fine slubs on the warp threads, forming air pockets between warp and weft, which enhance moisture absorption, water absorbency, and heat retention. As a result, Aizu Cotton is comfortable year-round—cool in summer and warm in winter.