Adidas decided it would suffice to make the shirts look like the quintessential American fabric. The problem for Adidas was that soccer players couldn’t lug around heavy cotton tops for 90 minutes. Philadelphia PhilliesPittsburgh PiratesSan Diego PadresSan Francisco GiantsSeattle MarinersSt. This didn’t exactly usher in a roaring jeans-as-athletic-wear boom, world cup jersey 2014 but it did lay the groundwork for the denim U.S. Moore says designers created the jersey’s distinctively distorted pattern by laying stars on the shirts, then dragging them across the glass surface of a Xerox machine as it scanned.