Originally jersey was the name for woolen garments which were hand knitted on the Channel Island of Jersey. The French name is tricot. Nowadays, it means a machine-knit fabric of fine yarn which may be made anywhere, of wool or cotton or viscose or any material. Because of its being knit, the fabric is elastic and ideal for supple garments.
The jersey fabrics are from organic cotton, and GOTS certified, so made with respect for people and the environment.