Jersey Number This authentic jersey will have the number 31 on it. Please note: the player's name is not on the jersey. Quality Construction Authentic Materials. Accurate detailing. Exceptional workmanship. These are the hallmarks of Mitchell & Ness' shirts, jackets, sweaters and felt pennants. The wool flannel shirts are constructed of a lightweight wool blend predominant in the late 60's. The 70's and 80's knit jerseys are made of fabrics identical to the originals. The jersey number shown is normally in stock and ready to ship immediately.