Baseball jerseys have come quite a distance because the early times of the sport. At first, they were just made of wool with no numbers or logos. In 1920s and 30s, pinstripes and also team logos started initially to appear. That It wasn't until that the 1970s that names and numbers became standard.The rise of synthetic fibers, like because polyester, began in that the '70s. The lightweight textile ended up being breathable, allowing of better ventilation during games. This shift in materials also allowed providers to create more vibrant and fixed team colors.