Jersey is a knit fabric that has many great attributes. It is light and flexible, yet warm and insulating. It is a popular choice for t-shirts and a variety of other apparel. One interesting aspect of jersey is that it can be made from 100% cotton or from a cotton/polyester synthetic blend; it is the knit of the fabric that makes it unique. Jersey fabric is machine-knit with a very small grain. There is a right side and a wrong side, like most knitted fabrics. The right side has a vertical grain and the wrong side is horizontal. Apparel made with a jersey knit has the vertical grain facing out.