The Mitchell & Ness NBA Warm-Up Jackets from the Authentic Collection are a special must-have for fans! The Authentic Warm-Up Jackets correspond to the original jackets of the NBA pros from the respective era, which were worn by the players before the game. The tops are made of nylon and have a mesh lining. They also have the characteristic button placket, as well as the comfortable elasticated cuffs and hem. The design is rounded off with sewn-on logos on the front and back.