Real vintage football jerseys made on the identical circular knit machines as the originals. All jerseys are made in limited production runs of six pieces, with knit-in stripes, doubled elbows, and sewn felt numbers. Wool or acrylic yarn (depending on era), tight 16-gauge jersey knit. The fabric is comfortable, luxurious and durable. Quite simply the finest vintage football jersey available today. What else would you expect from EFF?